[libcxx-commits] [libcxx] [libc++][hardening] Add a greppable prefix to assertion messages. (PR #150560)

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llvmbot wrote:

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Failed to cherry-pick: 4ef92469ab341ac1bee39a9413ffaa845e307414

https://github.com/llvm/llvm-project/actions/runs/16655407332

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/150560