Makes gtest compile cleanly with MSVC's warning 4511 & 4512 (copy ctor /

assignment operator cannot be generated) enabled.

test/gtest_unittest.cc

@@ -6312,6 +6312,8 @@ class SequenceTestingListener : public EmptyTestEventListener {
 
   Vector<String>* vector_;
   const char* const id_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(SequenceTestingListener);
 };
 
 TEST(EventListenerTest, AppendKeepsOrder) {