Stabilize Wasm relaxed SIMD #1922

Job	Run time
Check Style	15s
Build Documentation	1m 4s
Automatic intrinsic verification	28s
Env Override	13s
Build std_detect	1m 0s
Test (i686-unknown-linux-gnu)	2m 2s
Test (x86_64-unknown-linux-gnu)	3m 44s
Test (x86_64-unknown-linux-gnu-emulated)	9m 18s
Test (arm-unknown-linux-gnueabihf)	1m 19s
Test (armv7-unknown-linux-gnueabihf)	10m 36s
Test (aarch64-unknown-linux-gnu)	21m 28s
Test (riscv64gc-unknown-linux-gnu)	1m 24s
Test (powerpc64le-unknown-linux-gnu)	3m 53s
Test (s390x-unknown-linux-gnu)	1m 22s
Test (wasm32-wasi)	1m 35s
Test (i586-unknown-linux-gnu)	1m 52s
Test (nvptx64-nvidia-cuda)	28s
Test (thumbv6m-none-eabi)	16s
Test (thumbv7m-none-eabi)	12s
Test (thumbv7em-none-eabi)	13s
Test (thumbv7em-none-eabihf)	14s
Test (aarch64-apple-darwin)	1m 55s
Test (x86_64-pc-windows-msvc)	6m 19s
Test (i686-pc-windows-msvc)	2m 52s
Test (x86_64-apple-darwin, macos-11)	7m 38s
success	1s
	1h 21m 41s

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