Update project authors statements to Dartino

tests/pkg/os/system_info_test.dart

-// Copyright (c) 2014, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2014, 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 'package:expect/expect.dart';
 import 'package:os/os.dart' as os;
 
 void main() {
   var systemInfo = os.sys.info();
 
   Expect.isTrue(systemInfo.operatingSystemName is String);
   Expect.isTrue(systemInfo.nodeName is String);
   Expect.isTrue(systemInfo.release is String);
   Expect.isTrue(systemInfo.version is String);
   Expect.isTrue(systemInfo.machine is String);
 }