Tests fail on big-endian arches

[QuLogic]

When building on s390x, tests fail:

--- FAIL: TestRefStrings (0.00s)
    murmur_test.go:41: [Hash32] key: 'hello', seed: '0': 0x84c85fd5 (want 0x248bfa47)
    murmur_test.go:48: [Hash32] key: 'hello', seed: '0': 84c85fd5 (want 248bfa47)
    murmur_test.go:52: [Hash32] key 'hello', seed: '0': 0x84c85fd5 (want 0x248bfa47)
    murmur_test.go:41: [Hash32] key: 'hello, world', seed: '0': 0xa98a45f8 (want 0x149bbb7f)
    murmur_test.go:48: [Hash32] key: 'hello, world', seed: '0': a98a45f8 (want 149bbb7f)
    murmur_test.go:52: [Hash32] key 'hello, world', seed: '0': 0xa98a45f8 (want 0x149bbb7f)
    murmur_test.go:41: [Hash32] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': 0xa74dd6ac (want 0xe31e8a70)
    murmur_test.go:48: [Hash32] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': a74dd6ac (want e31e8a70)
    murmur_test.go:52: [Hash32] key '19 Jan 2038 at 3:14:07 AM', seed: '0': 0xa74dd6ac (want 0xe31e8a70)
    murmur_test.go:58: '[Hash64] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': 0xcef175caccc2d982 (want 0xb89e5988b737affc)
    murmur_test.go:65: [Hash64] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': cef175caccc2d982 (want b89e5988b737affc)
    murmur_test.go:69: [Hash64] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': 0xcef175caccc2d982 (want 0xb89e5988b737affc)
    murmur_test.go:76: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': 0xcef175caccc2d982-0x43fd5acb8ce000a8 (want 0xb89e5988b737affc-0x664fc2950231b2cb)
    murmur_test.go:83: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': cef175caccc2d98243fd5acb8ce000a8 (want b89e5988b737affc664fc2950231b2cb)
    murmur_test.go:87: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': 0xcef175caccc2d982-0x43fd5acb8ce000a8 (want 0xb89e5988b737affc-0x664fc2950231b2cb)
    murmur_test.go:41: [Hash32] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': 0x4f6a2b71 (want 0xd5c48bfc)
    murmur_test.go:48: [Hash32] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': 4f6a2b71 (want d5c48bfc)
    murmur_test.go:52: [Hash32] key 'The quick brown fox jumps over the lazy dog.', seed: '0': 0x4f6a2b71 (want 0xd5c48bfc)
    murmur_test.go:58: '[Hash64] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': 0xa9dcb521e865357b (want 0xcd99481f9ee902c9)
    murmur_test.go:65: [Hash64] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': a9dcb521e865357b (want cd99481f9ee902c9)
    murmur_test.go:69: [Hash64] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': 0xa9dcb521e865357b (want 0xcd99481f9ee902c9)
    murmur_test.go:76: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': 0xa9dcb521e865357b-0x31929daa7f2d439e (want 0xcd99481f9ee902c9-0x695da1a38987b6e7)
    murmur_test.go:83: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': a9dcb521e865357b31929daa7f2d439e (want cd99481f9ee902c9695da1a38987b6e7)
    murmur_test.go:87: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': 0xa9dcb521e865357b-0x31929daa7f2d439e (want 0xcd99481f9ee902c9-0x695da1a38987b6e7)
    murmur_test.go:41: [Hash32] key: 'hello', seed: '1': 0x3abb1755 (want 0xbb4abcad)
    murmur_test.go:48: [Hash32] key: 'hello', seed: '1': 3abb1755 (want bb4abcad)
    murmur_test.go:52: [Hash32] key 'hello', seed: '1': 0x3abb1755 (want 0xbb4abcad)
    murmur_test.go:41: [Hash32] key: 'hello, world', seed: '1': 0x603764bb (want 0x6f5cb2e9)
    murmur_test.go:48: [Hash32] key: 'hello, world', seed: '1': 603764bb (want 6f5cb2e9)
    murmur_test.go:52: [Hash32] key 'hello, world', seed: '1': 0x603764bb (want 0x6f5cb2e9)
    murmur_test.go:41: [Hash32] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 0x4a7fcb64 (want 0xf50e1f30)
    murmur_test.go:48: [Hash32] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 4a7fcb64 (want f50e1f30)
    murmur_test.go:52: [Hash32] key '19 Jan 2038 at 3:14:07 AM', seed: '1': 0x4a7fcb64 (want 0xf50e1f30)
    murmur_test.go:58: '[Hash64] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 0x9c2486a8436dc6d4 (want 0x2a929de9c8f97b2f)
    murmur_test.go:65: [Hash64] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 9c2486a8436dc6d4 (want 2a929de9c8f97b2f)
    murmur_test.go:69: [Hash64] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 0x9c2486a8436dc6d4 (want 0x2a929de9c8f97b2f)
    murmur_test.go:76: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 0x9c2486a8436dc6d4-0x8b246db6d41ca4cd (want 0x2a929de9c8f97b2f-0x56a41d99af43a2db)
    murmur_test.go:83: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 9c2486a8436dc6d48b246db6d41ca4cd (want 2a929de9c8f97b2f56a41d99af43a2db)
    murmur_test.go:87: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 0x9c2486a8436dc6d4-0x8b246db6d41ca4cd (want 0x2a929de9c8f97b2f-0x56a41d99af43a2db)
    murmur_test.go:41: [Hash32] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 0x30ce84fd (want 0x846f6a36)
    murmur_test.go:48: [Hash32] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 30ce84fd (want 846f6a36)
    murmur_test.go:52: [Hash32] key 'The quick brown fox jumps over the lazy dog.', seed: '1': 0x30ce84fd (want 0x846f6a36)
    murmur_test.go:58: '[Hash64] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 0x628443d6482f2887 (want 0xfb3325171f9744da)
    murmur_test.go:65: [Hash64] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 628443d6482f2887 (want fb3325171f9744da)
    murmur_test.go:69: [Hash64] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 0x628443d6482f2887 (want 0xfb3325171f9744da)
    murmur_test.go:76: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 0x628443d6482f2887-0x3dde79f9da7a3d93 (want 0xfb3325171f9744da-0xaaf8b92a5f722952)
    murmur_test.go:83: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 628443d6482f28873dde79f9da7a3d93 (want fb3325171f9744daaaf8b92a5f722952)
    murmur_test.go:87: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 0x628443d6482f2887-0x3dde79f9da7a3d93 (want 0xfb3325171f9744da-0xaaf8b92a5f722952)
    murmur_test.go:41: [Hash32] key: 'hello', seed: '42': 0xb4fc956f (want 0xe2dbd2e1)
    murmur_test.go:48: [Hash32] key: 'hello', seed: '42': b4fc956f (want e2dbd2e1)
    murmur_test.go:52: [Hash32] key 'hello', seed: '42': 0xb4fc956f (want 0xe2dbd2e1)
    murmur_test.go:41: [Hash32] key: 'hello, world', seed: '42': 0x8cdde10 (want 0x7ec7c6c2)
    murmur_test.go:48: [Hash32] key: 'hello, world', seed: '42': 08cdde10 (want 7ec7c6c2)
    murmur_test.go:52: [Hash32] key 'hello, world', seed: '42': 0x8cdde10 (want 0x7ec7c6c2)
    murmur_test.go:41: [Hash32] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 0x4e1b5ffd (want 0x58f745f6)
    murmur_test.go:48: [Hash32] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 4e1b5ffd (want 58f745f6)
    murmur_test.go:52: [Hash32] key '19 Jan 2038 at 3:14:07 AM', seed: '42': 0x4e1b5ffd (want 0x58f745f6)
    murmur_test.go:58: '[Hash64] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 0x74da3b584f708419 (want 0xfd8f19ebdc8c6b6a)
    murmur_test.go:65: [Hash64] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 74da3b584f708419 (want fd8f19ebdc8c6b6a)
    murmur_test.go:69: [Hash64] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 0x74da3b584f708419 (want 0xfd8f19ebdc8c6b6a)
    murmur_test.go:76: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 0x74da3b584f708419-0x70bc8f344c720268 (want 0xfd8f19ebdc8c6b6a-0xd30fdc310fa08ff9)
    murmur_test.go:83: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 74da3b584f70841970bc8f344c720268 (want fd8f19ebdc8c6b6ad30fdc310fa08ff9)
BUILDSTDERR:     murmur_test.go:87: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 0x74da3b584f7error: Bad exit status from /var/tmp/rpm-tmp.nLSukM (%check)
BUILDSTDERR:     Bad exit status from /var/tmp/rpm-tmp.nLSukM (%check)
08419-0x70bc8f344c720268 (want 0xfd8f19ebdc8c6b6a-0xd30fdc310fa08ff9)
    murmur_test.go:41: [Hash32] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': 0xb30cdd6a (want 0xc02d1434)
    murmur_test.go:48: [Hash32] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': b30cdd6a (want c02d1434)
    murmur_test.go:52: [Hash32] key 'The quick brown fox jumps over the lazy dog.', seed: '42': 0xb30cdd6a (want 0xc02d1434)
    murmur_test.go:58: '[Hash64] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': 0x273479948464724d (want 0x74f33c659cda5af7)
    murmur_test.go:65: [Hash64] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': 273479948464724d (want 74f33c659cda5af7)
    murmur_test.go:69: [Hash64] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': 0x273479948464724d (want 0x74f33c659cda5af7)
    murmur_test.go:76: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': 0x273479948464724d-0x41792c09e77ee500 (want 0x74f33c659cda5af7-0x4ec7a891caf316f0)
    murmur_test.go:83: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': 273479948464724d41792c09e77ee500 (want 74f33c659cda5af74ec7a891caf316f0)
    murmur_test.go:87: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': 0x273479948464724d-0x41792c09e77ee500 (want 0x74f33c659cda5af7-0x4ec7a891caf316f0)
hel|lo|
hel|lo, wo|rld|
19 |Jan 20|38 at 3:14:0|7 AM|
The| quick| brown fox j|umps over the lazy dog.|
hel|lo|
hel|lo, wo|rld|
19 |Jan 20|38 at 3:14:0|7 AM|
The| quick| brown fox j|umps over the lazy dog.|
hel|lo|
hel|lo, wo|rld|
19 |Jan 20|38 at 3:14:0|7 AM|
The| quick| brown fox j|umps over the lazy dog.|
--- FAIL: TestIncremental (0.00s)
    murmur_test.go:109: [Hash32] key: 'hello', seed: '0': 0x84c85fd5 (want 0x248bfa47)
    murmur_test.go:109: [Hash32] key: 'hello, world', seed: '0': 0xa98a45f8 (want 0x149bbb7f)
    murmur_test.go:109: [Hash32] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': 0xa74dd6ac (want 0xe31e8a70)
    murmur_test.go:112: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '0': 0xcef175caccc2d982-0x43fd5acb8ce000a8 (want 0xb89e5988b737affc-0x664fc2950231b2cb)
    murmur_test.go:109: [Hash32] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': 0x4f6a2b71 (want 0xd5c48bfc)
    murmur_test.go:112: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '0': 0xa9dcb521e865357b-0x31929daa7f2d439e (want 0xcd99481f9ee902c9-0x695da1a38987b6e7)
    murmur_test.go:109: [Hash32] key: 'hello', seed: '1': 0x3abb1755 (want 0xbb4abcad)
    murmur_test.go:109: [Hash32] key: 'hello, world', seed: '1': 0x603764bb (want 0x6f5cb2e9)
    murmur_test.go:109: [Hash32] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 0x4a7fcb64 (want 0xf50e1f30)
    murmur_test.go:112: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '1': 0x9c2486a8436dc6d4-0x8b246db6d41ca4cd (want 0x2a929de9c8f97b2f-0x56a41d99af43a2db)
    murmur_test.go:109: [Hash32] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 0x30ce84fd (want 0x846f6a36)
    murmur_test.go:112: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '1': 0x628443d6482f2887-0x3dde79f9da7a3d93 (want 0xfb3325171f9744da-0xaaf8b92a5f722952)
    murmur_test.go:109: [Hash32] key: 'hello', seed: '42': 0xb4fc956f (want 0xe2dbd2e1)
    murmur_test.go:109: [Hash32] key: 'hello, world', seed: '42': 0x8cdde10 (want 0x7ec7c6c2)
    murmur_test.go:109: [Hash32] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 0x4e1b5ffd (want 0x58f745f6)
    murmur_test.go:112: [Hash128] key: '19 Jan 2038 at 3:14:07 AM', seed: '42': 0x74da3b584f708419-0x70bc8f344c720268 (want 0xfd8f19ebdc8c6b6a-0xd30fdc310fa08ff9)
    murmur_test.go:109: [Hash32] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': 0xb30cdd6a (want 0xc02d1434)
    murmur_test.go:112: [Hash128] key: 'The quick brown fox jumps over the lazy dog.', seed: '42': 0x273479948464724d-0x41792c09e77ee500 (want 0x74f33c659cda5af7-0x4ec7a891caf316f0)
FAIL

I'm fairly certain that murmur2 is not endian-neutral, so using the same hash result as little-endian won't work. MurmerHash3 should be endian-neutral, so maybe this has to do with #11.