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

[Tobias Hieta via cfe-commits]

tru wrote:

No I don't think it's job's fault. I ran clang-format on this file and it's not formatted at all, so I think when we ask it to just format a patch like we do in the job, it gets a bit confused and give you a bit of non-sense formatting. This is just a limitation of not running formatting on the whole file. 

Two solutions:
1) just ignore it, it looks fine in general.
2) Push a NFC commit that fixes the formatting of this file and then rebase/merge to get that commit in your branch and it should look fine.


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