Update project authors statements to Dartino

tools/testing/dart/decode_exit_code.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.
 
 library test.decode_exit_code;
 
 import 'status_file_parser.dart' show
     Expectation;
 
 import 'test_runner.dart' show
     TestCase;
@@ skipping 63 matching lines @@
         return Expectation.MISSING_ERROR;
       }
       return outcome.canBeOutcomeOf(Expectation.FAIL)
           ? Expectation.PASS
           : outcome;
     }
 
     return outcome;
   }
 }