md2

sha1: port `sha1-asm` to `arch` intrinsics (#596) #1014

Job	Run time
minimal-versions / minimal-versions	1m 15s
set-msrv / set-msrv	3s
build (1.71.0, thumbv7em-none-eabi)	17s
test (1.71.0)	51s
build (1.71.0, wasm32-unknown-unknown)	30s
test (stable)	52s
build (stable, thumbv7em-none-eabi)	40s
build (stable, wasm32-unknown-unknown)	13s
	4m 41s

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