Fix cpplint whitespace/comments issues

Change-Id: Iae286862c85fb8fd8901eae1204cd6d271d69496
diff --git a/compiler/dex/frontend.h b/compiler/dex/frontend.h
index a863389..5c68ab4 100644
--- a/compiler/dex/frontend.h
+++ b/compiler/dex/frontend.h
@@ -102,7 +102,7 @@
 
   private:
     UniquePtr< ::llvm::LLVMContext> llvm_context_;
-    ::llvm::Module* llvm_module_; // Managed by context_.
+    ::llvm::Module* llvm_module_;  // Managed by context_.
     UniquePtr<art::llvm::IntrinsicHelper> intrinsic_helper_;
     UniquePtr<art::llvm::IRBuilder> ir_builder_;
 };