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
diff --git a/llvm/lib/Analysis/IPA/GlobalsModRef.cpp b/llvm/lib/Analysis/IPA/GlobalsModRef.cpp
index 3e47c69..a32631d 100644
--- a/llvm/lib/Analysis/IPA/GlobalsModRef.cpp
+++ b/llvm/lib/Analysis/IPA/GlobalsModRef.cpp
@@ -189,7 +189,7 @@
                               GlobalValue *OkayStoreDest = nullptr);
     bool AnalyzeIndirectGlobalMemory(GlobalValue *GV);
   };
-}
+} // namespace
 
 char GlobalsModRef::ID = 0;
 INITIALIZE_AG_PASS_BEGIN(GlobalsModRef, AliasAnalysis,