[clang] [compiler-rt] [llvm] [X86] Support APXF to enable __builtin_cpu_supports. (PR #80636)

[Phoebe Wang via cfe-commits]

phoebewang wrote:

You may also need to transfer "apxf" feature into subfeatures here https://github.com/llvm/llvm-project/blob/main/clang/lib/Basic/Targets/X86.cpp#L106

https://github.com/llvm/llvm-project/pull/80636