Better detection of available features on RISCV #105

Job	Run time
build-test-on-loongarch64	1m 58s
build-test-on-arm32	2m 56s
build-test-on-armt2	3m 1s
build-test-on-aarch64	1m 38s
build-test-on-riscv32	2m 22s
build-test-on-riscv32-extensions	2m 12s
build-test-on-riscv64	2m 24s
build-test-on-riscv64-extensions	2m 8s
build-test-on-s390x	2m 58s
build-test-on-x64	20s
build-test-on-x86	23s
	22m 20s

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