[clang] [llvm] Reland [clang][AArch64] Add getHostCPUFeatures to query for enabled f… (PR #115467)

[David Green via cfe-commits]

davemgreen wrote:

I'm not sure I understood the original error properly but if we can come up with a fix like this it sounds sensible to me. Is the test still failing in the pre-commit tests? You might need something stronger - like only running the test on aarch64 host machines. There are some other tests for -mcpu=native that have comments that it is difficult to test.

https://github.com/llvm/llvm-project/pull/115467