Update project authors statements to Dartino

pkg/mdns/test/native_extension_test.dart

-// 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.
 
 import 'dart:async';
 
 import 'package:expect/expect.dart';
 import 'package:mdns/src/native_extension_client.dart';
 
 Future<Null> main() async {
   String message1 = 'Hello, world!';
   String result1 = await nativeExtensionEchoTest(message1);
   Expect.equals(message1, result1);
 
   List<int> message2 = [1, 2];
   List<int> result2 = await nativeExtensionEchoTest(message2);
   Expect.listEquals(message2, result2);
 }