request 8-byte buffer alignment on macos #146

Job	Run time
miri	2m 31s
nostd-build (1.41.1, false, thumbv6m-none-eabi)	3m 33s
cross_test (stable, aarch64-unknown-linux-gnu, constconf cgemm threading)	3m 20s
nostd-build (stable, false, thumbv6m-none-eabi)	23s
tests (1.41.1, false, ubuntu-latest, x86_64-unknown-linux-gnu, cgemm)	1m 8s
cross_test (1.61.0, aarch64-unknown-linux-gnu, cgemm)	3m 4s
tests (stable, false, ubuntu-latest, x86_64-unknown-linux-gnu, threading cgemm, yes_examples, yes...	1m 6s
cross_test (1.41.1, aarch64-unknown-linux-gnu, cgemm)	3m 21s
tests (nightly, false, ubuntu-latest, x86_64-unknown-linux-gnu, avx)	33s
tests (nightly, ubuntu-latest, x86_64-unknown-linux-gnu, threading cgemm, fma, false)	1m 7s
tests (nightly, ubuntu-latest, i686-unknown-linux-gnu, cgemm, sudo apt-get update sudo apt-get in...	1m 5s
tests (stable, false, macos-latest, x86_64-apple-darwin, threading cgemm, yes_examples)	46s
	21m 57s

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