Update project authors statements to Dartino

tests/service_tests/performance/performance_test.cc

-// Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2015, the Dartino project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 #include <pthread.h>
 #include <sys/time.h>
 
 #include <cstdio>
 
 #include "include/service_api.h"
 #include "include/fletch_api.h"
@@ skipping 173 matching lines @@
     printf("Usage: %s <snapshot>\n", argv[0]);
     return 1;
   }
   SetupPerformanceTest(argc, argv);
   RunEchoTests();
   RunTreeTests();
   RunThreadTests();
   TearDownPerformanceTest();
   return 0;
 }