[llvm-branch-commits] [clang] release/18.x: [clang][modules] giving the __stddef_ headers their own modules can cause redeclaration errors with -fbuiltin-headers-in-system-modules (#84127) (PR #85118)

[Tom Stellard via llvm-branch-commits]

https://github.com/tstellar closed https://github.com/llvm/llvm-project/pull/85118