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/DebugInfo/DWARF/DWARFAcceleratorTable.cpp b/llvm/lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
index 8ae0543..fd33c7d 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
@@ -129,4 +129,4 @@
     }
   }
 }
-}
+} // namespace llvm
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp b/llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp
index 53a676e..48e1d55 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp
@@ -61,7 +61,7 @@
   };
   return makeArrayRef(sizes);
 }
-}
+} // namespace
 
 ArrayRef<uint8_t> DWARFFormValue::getFixedFormSizes(uint8_t AddrSize,
                                                     uint16_t Version) {
diff --git a/llvm/lib/DebugInfo/DWARF/SyntaxHighlighting.h b/llvm/lib/DebugInfo/DWARF/SyntaxHighlighting.h
index 946a313..84afd37 100644
--- a/llvm/lib/DebugInfo/DWARF/SyntaxHighlighting.h
+++ b/llvm/lib/DebugInfo/DWARF/SyntaxHighlighting.h
@@ -32,8 +32,8 @@
   llvm::raw_ostream& get() { return OS; }
   operator llvm::raw_ostream& () { return OS; }
 };
-}
-}
-}
+} // namespace syntax
+} // namespace dwarf
+} // namespace llvm
 
 #endif
diff --git a/llvm/lib/DebugInfo/PDB/PDBSymbolFunc.cpp b/llvm/lib/DebugInfo/PDB/PDBSymbolFunc.cpp
index 0aff327..8f56de8 100644
--- a/llvm/lib/DebugInfo/PDB/PDBSymbolFunc.cpp
+++ b/llvm/lib/DebugInfo/PDB/PDBSymbolFunc.cpp
@@ -80,7 +80,7 @@
   ArgListType Args;
   ArgListType::const_iterator CurIter;
 };
-}
+} // namespace
 
 PDBSymbolFunc::PDBSymbolFunc(const IPDBSession &PDBSession,
                              std::unique_ptr<IPDBRawSymbol> Symbol)
diff --git a/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionSig.cpp b/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionSig.cpp
index af3563f..fcee182 100644
--- a/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionSig.cpp
+++ b/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionSig.cpp
@@ -63,7 +63,7 @@
   const IPDBSession &Session;
   std::unique_ptr<ArgEnumeratorType> Enumerator;
 };
-}
+} // namespace
 
 PDBSymbolTypeFunctionSig::PDBSymbolTypeFunctionSig(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)