Fixed/added namespace ending comments using clang-tidy. NFC

The patch is generated using this command:

tools/clang/tools/extra/clang-tidy/tool/run-clang-tidy.py -fix \
  -checks=-*,llvm-namespace-comment -header-filter='llvm/.*|clang/.*' \
  llvm/lib/


Thanks to Eugene Kosov for the original patch!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240137 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/IRReader/IRReader.h

@@ -43,6 +43,6 @@ std::unique_ptr<Module> parseIR(MemoryBufferRef Buffer, SMDiagnostic &Err,
 /// for it.
 std::unique_ptr<Module> parseIRFile(StringRef Filename, SMDiagnostic &Err,
                                     LLVMContext &Context);
-}
+} // namespace llvm
 
 #endif