Fix cpplint whitespace/comments issues

Change-Id: Iae286862c85fb8fd8901eae1204cd6d271d69496
diff --git a/runtime/native/dalvik_system_VMDebug.cc b/runtime/native/dalvik_system_VMDebug.cc
index 992998e..60624c2 100644
--- a/runtime/native/dalvik_system_VMDebug.cc
+++ b/runtime/native/dalvik_system_VMDebug.cc
@@ -101,12 +101,12 @@
 
 static void VMDebug_startEmulatorTracing(JNIEnv*, jclass) {
   UNIMPLEMENTED(WARNING);
-  //dvmEmulatorTraceStart();
+  // dvmEmulatorTraceStart();
 }
 
 static void VMDebug_stopEmulatorTracing(JNIEnv*, jclass) {
   UNIMPLEMENTED(WARNING);
-  //dvmEmulatorTraceStop();
+  // dvmEmulatorTraceStop();
 }
 
 static jboolean VMDebug_isDebuggerConnected(JNIEnv*, jclass) {