[lld] [llvm] [lld][AArch64][Build Attributes] Add support for AArch64 Build Attributes (PR #147970)

[Mark Murray via llvm-commits]

MarkMurrayARM wrote:

This supersedes https://github.com/llvm/llvm-project/pull/144082 as Sivan has moved to a different project.

https://github.com/llvm/llvm-project/pull/147970