[llvm] [LLVM][Clang][AArch64] Implement AArch64 build attributes (PR #123990)

[Peter Smith via llvm-commits]

smithp35 wrote:

GNU ld support is being worked on by one of our GNU team at the moment, I don't think they have published any patches yet.  It is aiming for GCC 15 and the next binutills release.

If you can give me some time, I'll take the idea of using SHF_EXCLUDE to the GNU team to see if that will cause any problems. I think that flag is fairly recent so I'd like to check what binutils support it.

https://github.com/llvm/llvm-project/pull/123990