Fix cpplint whitespace/comments issues

Change-Id: Iae286862c85fb8fd8901eae1204cd6d271d69496
diff --git a/compiler/elf_writer_mclinker.h b/compiler/elf_writer_mclinker.h
index bdadf8f..5da178c 100644
--- a/compiler/elf_writer_mclinker.h
+++ b/compiler/elf_writer_mclinker.h
@@ -30,7 +30,7 @@
 class Linker;
 class LinkerConfig;
 class Module;
-} // namespace mcld
+}  // namespace mcld
 
 namespace art {