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

lib/CodeGen/MachineVerifier.cpp

@@ -258,7 +258,7 @@ namespace {
     }
   };
 
-}
+} // namespace
 
 char MachineVerifierPass::ID = 0;
 INITIALIZE_PASS(MachineVerifierPass, "machineverifier",
@@ -1710,7 +1710,7 @@ namespace {
     bool EntryIsSetup;
     bool ExitIsSetup;
   };
-}
+} // namespace
 
 /// Make sure on every path through the CFG, a FrameSetup <n> is always followed
 /// by a FrameDestroy <n>, stack adjustments are identical on all