[clang] [llvm] [clang-tools-extra] [Clang] Fix : More Detailed "No expected directives found" (PR #78338)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

Thank you for the fix! Can you please add more description to what is being fixed and how to the PR summary (as that becomes the commit message when we land the changes)?

I don't think a release note is necessary because this isn't really a user-facing feature (it's a feature for developers of Clang), but the changes should come with some test coverage, probably in `clang/test/Frontend/verify.c` or a new test similar to it.

https://github.com/llvm/llvm-project/pull/78338