Remove the auxv dev dependency. #1828

Job	Run time
Check Style	19s
Build std_detect	1m 32s
Env Override	15s
Build Documentation	1m 42s
Test (i686-unknown-linux-gnu)	3m 59s
Automatic intrinsic verification	48s
Test (x86_64-unknown-linux-gnu)	8m 7s
Test (x86_64-unknown-linux-gnu-emulated)	12m 42s
Test (arm-unknown-linux-gnueabihf)	2m 38s
Test (armv7-unknown-linux-gnueabihf)	16m 50s
Test (aarch64-unknown-linux-gnu)	32m 10s
Test (riscv64gc-unknown-linux-gnu)	2m 51s
Test (powerpc64le-unknown-linux-gnu)	9m 21s
Test (s390x-unknown-linux-gnu)	3m 0s
Test (wasm32-wasi)	2m 59s
Test (i586-unknown-linux-gnu)	3m 17s
Test (nvptx64-nvidia-cuda)	38s
Test (thumbv6m-none-eabi)	17s
Test (thumbv7m-none-eabi)	23s
Test (thumbv7em-none-eabi)	21s
Test (thumbv7em-none-eabihf)	20s
Test (aarch64-apple-darwin)	1m 57s
Test (x86_64-pc-windows-msvc)	13m 18s
Test (i686-pc-windows-msvc)	6m 33s
Test (x86_64-apple-darwin, macos-11)	7m 46s
	2h 14m 3s

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