[libcxx-commits] [libcxx] [libcxxabi] [libc++][libc++abi] Minor follow-up changes after ptrauth upstreaming (PR #87481)

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llvmbot wrote:

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Failed to cherry-pick: e64e745

https://github.com/llvm/llvm-project/actions/runs/10064019269

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

https://github.com/llvm/llvm-project/pull/87481