[llvm] [DWARFLinker] backport line table patch into the DWARFLinkerParallel. (PR #77497)

[Jonas Devlieghere via llvm-commits]

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

I noticed it was missing when I added the MD5 checksum to the parallel dwarf linker but I didn't get around to backporting it. Thanks for taking care of this!

https://github.com/llvm/llvm-project/pull/77497