[lld] [llvm] [lld][AArch64][Build Attributes] Add support for AArch64 Build Attributes (PR #144082)

[Peter Smith via llvm-commits]

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+// This file replace gnu properties with aarch64 build attributes.
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smithp35 wrote:

Similar comment to the aarch64-func3-pac-replace.s. You can use split-file to inline this into the test that uses it.

Would also recommend using BTI rather than PAC so you can add `BTI c` to func2.



https://github.com/llvm/llvm-project/pull/144082