Test

ST: Use clock_gettime to prevent time jumping backwards. v7.0.17 #3159

Job	Run time
cygwin64-cache	2m 52s
multiple-arch-aarch64	5m 29s
multiple-arch-armv7	5m 29s
utest-regression-blackbox-test	4m 26s
cygwin64	7m 29s
fast	1s
build-ubuntu18	1m 31s
build-centos7	2m 16s
build-cross-aarch64	2m 26s
build-cross-arm	2m 29s
build-ubuntu16	1m 40s
build-ubuntu20	1m 42s
coverage	2m 31s
multiple-arch-amd64	1m 21s
test-done	0s
	41m 42s

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