Added tools/status_clean.dart script

dart/tools/testing/dart/test_progress.dart

 // Copyright (c) 2013, 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:async";
 import "dart:io";
 import "dart:io" as io;
 import "dart:convert" show JSON;
@@ skipping 206 matching lines @@
    *           duration: 200.2,
    *         },
    *       ],
    *     }
    *  },
    */
 
   static final INTERESTED_CONFIGURATION_PARAMETERS =
       ['mode', 'arch', 'compiler', 'runtime', 'checked', 'host_checked',
        'minified', 'csp', 'system', 'vm_options', 'use_sdk',
-       'use_repository_packages', 'use_public_packages'];
+       'use_repository_packages', 'use_public_packages', 'builder_tag'];
 
   IOSink _sink;
 
   void done(TestCase test) {
     var name = test.displayName;
     var configuration = {};
     for (var key in INTERESTED_CONFIGURATION_PARAMETERS) {
       configuration[key] = test.configuration[key];
     }
     var outcome = '${test.lastCommandOutput.result(test)}';
@@ skipping 420 matching lines @@
       return new VerboseProgressIndicator(startTime);
     case 'status':
       return new ProgressIndicator(startTime);
     case 'buildbot':
       return new BuildbotProgressIndicator(startTime);
     default:
       assert(false);
       break;
   }
 }