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

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

@timoh-ba Btw, before merging: Please turn off [Keep my email addresses private](https://github.com/settings/emails) setting in your account. See [LLVM Discourse](https://discourse.llvm.org/t/hidden-emails-on-github-should-we-do-something-about-it) for more information.

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