[clang] [llvm][tblgen] Add `SourcePath` for `emitSourceFileHeader` (PR #65744)

[NAKAMURA Takumi via cfe-commits]

" + sys::path::filename(Record.getInputFilename()),"
In-Reply-To: <llvm/llvm-project/pull/65744/clang at github.com>


https://github.com/chapuni approved this pull request.

Looks good. 
At the moment, this doesn't emit `path` but `file name`.
Since I'll push reformatting, could you rebase, squash, and retitle before pushing?

I guess we could emit more fancy paths with `-I` include paths. It may be done in the future.

https://github.com/llvm/llvm-project/pull/65744