[llvm] [DWARFLinker][NFC] Rename libraries to match with directories name. (PR #77592)

[Nico Weber via llvm-commits]

nico wrote:

Looks good to me. I'll wait a day for Adrian or Jonas to shout, else I'll hit the merge button tomorrow afternoon, thanks :)

https://github.com/llvm/llvm-project/pull/77592