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/CodeGen/InlineSpiller.cpp b/llvm/lib/CodeGen/InlineSpiller.cpp
index 9989f23..48c95c9 100644
--- a/llvm/lib/CodeGen/InlineSpiller.cpp
+++ b/llvm/lib/CodeGen/InlineSpiller.cpp
@@ -181,7 +181,7 @@
   void spillAroundUses(unsigned Reg);
   void spillAll();
 };
-}
+} // namespace
 
 namespace llvm {
 
@@ -194,7 +194,7 @@
   return new InlineSpiller(pass, mf, vrm);
 }
 
-}
+} // namespace llvm
 
 //===----------------------------------------------------------------------===//
 //                                Snippets