[Bug target/91520] AVX512 target assembler fails for x86_64 Darwin

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91520

--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
hmm BZ autodetected "mbox" for the attachment .. it should also be applicable
as a regular diff.