cpufeatures: fix macOS build (#1066) #489

Job	Run time
build (1.60.0, thumbv7em-none-eabi)	1m 34s
cross (aarch64-unknown-linux-gnu, 1.60.0)	1m 57s
build (1.60.0, wasm32-unknown-unknown)	1m 39s
build (stable, thumbv7em-none-eabi)	11s
cross (aarch64-unknown-linux-gnu, stable)	38s
build (stable, wasm32-unknown-unknown)	10s
cross (powerpc-unknown-linux-gnu, 1.60.0)	1m 54s
cross (powerpc-unknown-linux-gnu, stable)	31s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.60.0, sudo apt update && sudo apt install gcc-mult...	2m 1s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.60.0)	1m 33s
test (x86_64-pc-windows-msvc, windows-latest, 1.60.0)	2m 2s
test (x86_64-apple-darwin, macos-latest, 1.60.0)	1m 29s
minimal-versions / minimal-versions	35s
	16m 14s

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