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!

llvm-svn: 240137

llvm/lib/Analysis/ModuleDebugInfoPrinter.cpp

@@ -40,7 +40,7 @@ namespace {
     }
     void print(raw_ostream &O, const Module *M) const override;
   };
-}
+} // namespace
 
 char ModuleDebugInfoPrinter::ID = 0;
 INITIALIZE_PASS(ModuleDebugInfoPrinter, "module-debuginfo",