Included command to determine default target features #57

Job	Run time
rustfmt / run-ci-script	1m 26s
aarch64-apple-ios / run-ci-script	36s
aarch64-unknown-linux-android-NEON / run-ci-script	3m 44s
armv7-linux-androideabi / run-ci-script	3m 50s
arm-unknown-linux-gnueabihf / run-ci-script	48s
aarch64-unknown-linux-gnu-NEON / run-ci-script	50s
armv7-unknown-linux-gnueabihf / run-ci-script	53s
armv7-unknown-linux-gnueabihf-NEON / run-ci-script	57s
i586-unknown-linux-gnu / run-ci-script	57s
i586-unknown-linux-gnu-SSE / run-ci-script	57s
i586-unknown-linux-gnu-SSE2 / run-ci-script	51s
i686-unknown-linux-gnu / run-ci-script	49s
i686-unknown-linux-gnu-AVX2 / run-ci-script	54s
i686-unknown-linux-gnu-SSE4_2 / run-ci-script	56s
powerpc64le-unknown-linux-gnu / run-ci-script	1m 3s
powerpc64le-unknown-linux-gnu-ALTIVEC / run-ci-script	1m 0s
powerpc64le-unknown-linux-gnu-VSX / run-ci-script	53s
powerpc64-unknown-linux-gnu / run-ci-script	1m 6s
powerpc-unknown-linux-gnu / run-ci-script	57s
s390x-unknown-linux-gnu / run-ci-script	1m 5s
sparc64-unknown-linux-gnu / run-ci-script	1m 15s
thumbv7neon-linux-androideabi / run-ci-script	3m 52s
thumbv7neon-unknown-linux-gnueabihf / run-ci-script	55s
wasm32-unknown-unknown / run-ci-script	2m 13s
x86_64-apple-darwin-AVX / run-ci-script	34s
x86_64-apple-darwin-SSE4_2 / run-ci-script	32s
x86_64-apple-ios / run-ci-script	40s
x86_64-unknown-linux-android / run-ci-script	2m 17s
x86_64-unknown-linux-gnu / run-ci-script	1m 19s
x86_64-unknown-linux-gnu-AVX2 / run-ci-script	54s
x86_64-unknown-linux-gnu-SSE4_2 / run-ci-script	54s
	39m 57s

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