[llvm-branch-commits] [libcxx] release/18.x: [libcxx] [modules] Add _LIBCPP_USING_IF_EXISTS on aligned_alloc (#89827) (PR #89894)

[Mark de Wever via llvm-branch-commits]

mordante wrote:

I don't feel like this needs a release note.

https://github.com/llvm/llvm-project/pull/89894