Update project authors statements to Dartino

tests/unsorted/spawn_empty_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 'dart:fletch';
 
 void run2() {
 }
 
 void run1() {
   // TODO(kasperl): Ideally, we should be able to
   // run with close to 500,000 processes even on
   // a 32-bit machine with 2GB of available address
   // space. Right now, we get close to that but
   // not quite close enough (~150,000). Note that ASan
   // also introduces quite an overhead.
   for (int i = 0; i < 150; i++) {
     Process.spawnDetached(run2);
   }
 }
 
 void main() {
   for (int i = 0; i < 1000; i++) {
     Process.spawnDetached(run1);
   }
 }