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

[Nico Weber via llvm-commits]

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@@ -12,7 +12,7 @@ add_llvm_component_library(LLVMDWARFLinkerParallel
   SyntheticTypeNameBuilder.cpp
 
   ADDITIONAL_HEADER_DIRS
-  ${LLVM_MAIN_INCLUDE_DIR}/llvm/DWARFLinkerParallel
+  ${LLVM_MAIN_INCLUDE_DIR}/llvm/DWARFLinker/Parallel
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nico wrote:

same comment – since things worked with the old, wrong, name, maybe we can toss it altogether? (but seems like something for a different pr)

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