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

[via llvm-commits]

================
@@ -1,4 +1,5 @@
 set(LLVM_LINK_COMPONENTS
+  DWARFLinker
----------------
avl-llvm wrote:

This is necessary in general even if everything is working currently without DWARFLinker(as LLVMDWARFLinker contains base functionality). 

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