[llvm-branch-commits] [clang] release/21.x: [clang][PAC] ptrauth_qualifier and ptrauth_intrinsic should only be available on Darwin (#153912) (PR #154198)

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llvmbot wrote:

@AaronBallman What do you think about merging this PR to the release branch?

https://github.com/llvm/llvm-project/pull/154198