[lld] [llvm] [lld][AArch64][Build Attributes] Add support for converting AArch64 Build Attributes to GNU Properties (PR #131990)

[Jack Styles via llvm-commits]

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+// This file replace gnu properties with aarch64 build attributes.
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Stylie777 wrote:

`lld/test/ELF/aarch64-feature-gcs.s` should be a good example of using split files.

https://github.com/llvm/llvm-project/pull/131990