Fix cpplint whitespace/comments issues

Change-Id: Iae286862c85fb8fd8901eae1204cd6d271d69496
diff --git a/compiler/llvm/runtime_support_builder_arm.h b/compiler/llvm/runtime_support_builder_arm.h
index 6aa23b2..5a353d7 100644
--- a/compiler/llvm/runtime_support_builder_arm.h
+++ b/compiler/llvm/runtime_support_builder_arm.h
@@ -40,7 +40,7 @@
   virtual void EmitUnlockObject(::llvm::Value* object);
 };
 
-} // namespace llvm
-} // namespace art
+}  // namespace llvm
+}  // namespace art
 
 #endif  // ART_COMPILER_LLVM_RUNTIME_SUPPORT_BUILDER_ARM_H_