[llvm-branch-commits] [clang] [clang] Define ptrauth_sign_constant builtin. (PR #93904)

[Daniil Kovalev via llvm-branch-commits]

https://github.com/kovdan01 approved this pull request.

LGTM with a couple of documentation-related comments

https://github.com/llvm/llvm-project/pull/93904