Fix dartc stub generator tests.

tests/stub-generator/src/MintMakerFullyIsolatedTest.dart

 // Copyright (c) 2011, the Dart 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 file.
 
 // IsolateStubs=MintMakerFullyIsolatedTest.dart:Mint,Purse,PowerfulPurse
 
 interface Purse {
   Purse();
   int queryBalance();
   Purse$Proxy sproutPurse();
@@ skipping 200 matching lines @@
     }
     results.add(promise.then((int actual) {
       //print('done ' + expected + '/' + actual);
       Expect.equals(expected, actual);
     }));
   }
 
   static void expectDone(int n) {
     if (results === null) {
       Expect.equals(0, n);
-      //print('##DONE##');
+      print('##DONE##');
     } else {
       Promise done = new Promise();
       done.waitFor(results, results.length);
       done.then((ignored) { 
         //print('done all ' + n + '/' + results.length);
         Expect.equals(n, results.length);
-        //print('##DONE##');
+        print('##DONE##');
       });
     }
   }
 
 }
 
 main() {
   MintMakerFullyIsolatedTest.testMain();
 }