Update project authors statements to Dartino

pkg/fletchc/bin/decode_stacktraces.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 'dart:io' as io;
 
 import 'package:fletchc/program_info.dart';
 
 main(List<String> arguments) async {
   await decodeProgramMain(arguments, io.stdin, io.stdout);
 }