rc5

sm4: simd support for armv8, x86_64 #318

Job	Run time
test (1.85.0)	24s
test (stable)	23s
build (stable, wasm32-unknown-unknown)	18s
build (1.85.0, wasm32-unknown-unknown)	18s
build (1.85.0, thumbv7em-none-eabi)	18s
build (stable, thumbv7em-none-eabi)	21s
minimal-versions	0s
	2m 2s

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