Adding plugin goodbye response to quicktime plugin.

indra/media_plugins/quicktime/media_plugin_quicktime.cpp

@@ -837,7 +837,9 @@ void MediaPluginQuickTime::receiveMessage(const char *message_string)
 			else if(message_name == "cleanup")
 			{
 				// TODO: clean up here
-			}
+                LLPluginMessage message("base", "goodbye");
+                sendMessage(message);
+            }
 			else if(message_name == "shm_added")
 			{
 				SharedSegmentInfo info;