testsuite: ppc64le test failures

[marxin]

I noticed the following test failures on the target:

[  122s] Testing auxiliary ... mold: fatal: unknown emulation: 21
[  122s] make[1]: *** [Makefile.linux:6: elf/auxiliary.sh] Error 1
[  122s] make[1]: *** Waiting for unfinished jobs....
[  122s] Testing bno-symbolic ... mold: fatal: unknown -m argument: elf64lppc
[  122s] collect2: error: ld returned 1 exit status
[  122s] make[1]: *** [Makefile.linux:6: elf/bno-symbolic.sh] Error 1
[  122s] Testing bsymbolic-functions ... mold: fatal: unknown -m argument: elf64lppc
[  122s] collect2: error: ld returned 1 exit status
[  122s] make[1]: *** [Makefile.linux:6: elf/bsymbolic-functions.sh] Error 1
[  122s] Testing ar-alignment ... mold: fatal: unknown -m argument: elf64lppc
[  122s] collect2: error: ld returned 1 exit status
[  122s] make[1]: *** [Makefile.linux:6: elf/ar-alignment.sh] Error 1
[  122s] Testing allow-multiple-definition ... mold: fatal: unknown -m argument: elf64lppc
[  122s] collect2: error: ld returned 1 exit status
[  122s] make[1]: *** [Makefile.linux:6: elf/allow-multiple-definition.sh] Error 1
[  122s] Testing as-needed ... mold: fatal: unknown -m argument: elf64lppc
[  122s] collect2: error: ld returned 1 exit status
[  122s] make[1]: *** [Makefile.linux:6: elf/as-needed.sh] Error 1
[  122s] Testing as-needed-weak ... mold: fatal: unknown -m argument: elf64lppc
[  122s] collect2: error: ld returned 1 exit status
[  122s] make[1]: *** [Makefile.linux:6: elf/as-needed-weak.sh] Error 1
[  122s] Testing as-needed2 ... mold: fatal: unknown -m argument: elf64lppc
[  122s] collect2: error: ld returned 1 exit status
[  122s] make[1]: *** [Makefile.linux:6: elf/as-needed2.sh] Error 1
[  122s] make: *** [Makefile:162: test] Error 2
[  122s] error: Bad exit status from /var/tmp/rpm-tmp.k1FAjd (%check)

ppr64le-build.log.txt

[rui314]

ppc64le isn't supported yet.

[marxin]

Supported now! Thanks.