Update project authors statements to Dartino

tests/unsorted/external_memory_triggers_gc_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 'package:expect/expect.dart';
 import 'package:file/file.dart';
 
 // This test:
 //   * makes heap budget 1MB
 //   * allocates 4 GB of external memory in chunks of 1MB
 // Without tracking external memory, this test will consume 4 GB of memory and
@@ skipping 11 matching lines @@
 
   int size = 0;
   while (size < kTotalSize) {
     var bytes = file.read(kChunkSize).asUint8List();
     Expect.equals(bytes.length, kChunkSize);
     size += bytes.length;
   }
 
   file.close();
 }