[clang] [clang] fix uefi target for aarch64 & x86_64 (PR #120632)

[Tristan Ross via cfe-commits]

RossComputerGuy wrote:

> Should we have an entry for `-fdefine-target-os-macros` as well?

I think so, it wouldn't be a bad idea.

> Also needs a test

I might need some guidance on adding a test since I'm not fully familiar with the clang side of LLVM.

https://github.com/llvm/llvm-project/pull/120632