Add --build-directory option to test.py.

tools/testing/dart/test_progress.dart

 // Copyright (c) 2012, 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.
 
 #library("test_progress");
 
 #import("dart:io");
 #import("test_runner.dart");
 #import("test_suite.dart");
 #import("status_file_parser.dart");
@@ skipping 389 matching lines @@
     if (test.lastCommandOutput.unexpectedOutput) {
       status = 'fail';
     }
     var percent = ((_completedTests() / _foundTests) * 100).toInt().toString();
     print('Done ${test.configurationString} ${test.displayName}: $status');
     print('@@@STEP_CLEAR@@@');
     print('@@@STEP_TEXT@ $percent% +$_passedTests -$_failedTests @@@');
   }
 
   void _printFailureSummary() {
-    if (!_failureSummary.isEmpty) {
+    if (!_failureSummary.isEmpty && stepName != null) {
       print('@@@STEP_FAILURE@@@');
       print('@@@BUILD_STEP $stepName failures@@@');
     }
     super._printFailureSummary();
   }
 }
 
 class DiffProgressIndicator extends ColorProgressIndicator {
   Map<String, List<String>> statusToConfigs = new Map<String, List<String>>();
 
@@ skipping 42 matching lines @@
       print('');
       print('$config:');
       statuses.sort((a, b) => a.compareTo(b));
       for (String status in statuses) {
         print('  $status');
       }
     });
     _printStatus();
   }
 }