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/Support/StringPool.h

@@ -133,6 +133,6 @@ namespace llvm {
     inline bool operator!=(const PooledStringPtr &That) const { return S != That.S; }
   };
 
-} // End llvm namespace
+} // namespace llvm
 
 #endif