conversions CustomConversionsTest skip fp_sat_xxx

[wenhu1024]

related https://github.com/KhronosGroup/OpenCL-CTS/issues/2427

[CLAassistant]

All committers have signed the CLA.

[wenhu1024]

Hi @shajder, since you’ve contributed to these files before https://github.com/KhronosGroup/OpenCL-CTS/pull/1719 , would you mind reviewing this change? Appreciate any comments or suggestions you may have!

[shajder]

LGTM

[wenhu1024]

If run ./test_conversions fp_sat_xxx , the test result is always pass.

for example:

./test_conversions float_sat_int


conversions...
conversions passed
PASSED sub-test.
PASSED test.