Fix build:

tests/isolate/error_at_spawnuri_test.dart

 // Copyright (c) 2015, 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.
+//
+// OtherScripts=error_at_spawnuri_iso.dart
 
 library error_at_spawnuri;
 
 import "dart:isolate";
 import "dart:async";
 import "package:async_helper/async_helper.dart";
 import "package:expect/expect.dart";
 
 main(){
   asyncStart();
 
   // Capture errors from other isolate as raw messages.
   RawReceivePort errorPort = new RawReceivePort();
   errorPort.handler = (message) {
     String error = message[0];
     String stack = message[1];
     Expect.equals(new ArgumentError("fast error").toString(), "$error");
     errorPort.close();
     asyncEnd();
   };
   
   Isolate.spawnUri(Uri.parse("error_at_spawnuri_iso.dart"), [],
                    null,
                    // Setup handler as part of spawn.
                    errorsAreFatal: false,
                    onError: errorPort.sendPort);
 }