[llvm] [DWARF5][COFF] Fix wrong relocation in .debug_line (PR #83773)

[Martin Storsjö via llvm-commits]

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

FWIW, I'm ok with this change, so let's approve it. If nobody else has any objections to it, we can probably merge it tomorrow or so.

Still, as mentioned elsewhere, DWARF5 doesn't work properly for full debugging on mingw, but I guess this is one incremental step towards making it work.

https://github.com/llvm/llvm-project/pull/83773