[TableGen] Correct comments for end of namespace. NFC

Summary:
Update end-of-namespace comments generated by
tablegen emitters to fulfill the rules setup by
clang-tidy's llvm-namespace-comment checker.

Fixed a few end-of-namespace comments in the
tablegen source code as well.

Reviewers: craig.topper

Reviewed By: craig.topper

Subscribers: craig.topper, stoklund, dschuff, sbc100, jgravelle-google, aheejin, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66396

llvm-svn: 369865
diff --git a/llvm/utils/TableGen/AsmMatcherEmitter.cpp b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
index 508efa8..d32366e 100644
--- a/llvm/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
@@ -2381,7 +2381,7 @@
   OS << "  NumMatchClassKinds\n";
   OS << "};\n\n";
 
-  OS << "}\n\n";
+  OS << "} // end anonymous namespace\n\n";
 }
 
 /// emitMatchClassDiagStrings - Emit a function to get the diagnostic text to be
@@ -2866,7 +2866,7 @@
   OS << "    }\n";
   OS << "  };\n";
 
-  OS << "} // end anonymous namespace.\n\n";
+  OS << "} // end anonymous namespace\n\n";
 
   OS << "static const OperandMatchEntry OperandMatchTable["
      << Info.OperandMatchInfo.size() << "] = {\n";
@@ -3422,7 +3422,7 @@
   OS << "    }\n";
   OS << "  };\n";
 
-  OS << "} // end anonymous namespace.\n\n";
+  OS << "} // end anonymous namespace\n\n";
 
   unsigned VariantCount = Target.getAsmParserVariantCount();
   for (unsigned VC = 0; VC != VariantCount; ++VC) {