[llvm-branch-commits] [clang] release/21.x: [clang] Allow trivial pp-directives before C++ module directive (#153641) (PR #154077)

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yronglin wrote:

Do you know how to merge this patch?
<img width="472" height="233" alt="image" src="https://github.com/user-attachments/assets/51b40b7a-a0b5-4b10-855f-43c10f07e573" />


https://github.com/llvm/llvm-project/pull/154077