Include DBC in the "all" architecture.

tools/testing/dart/test_options.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_options_parser;
 
 import "dart:io";
 import "drt_updater.dart";
 import "test_suite.dart";
 import "path.dart";
@@ skipping 675 matching lines @@
     return isValid;
   }
 
   /**
    * Recursively expand a configuration with multiple values per key
    * into a list of configurations with exactly one value per key.
    */
   List<Map> _expandConfigurations(Map configuration) {
     // Expand the pseudo-values such as 'all'.
     if (configuration['arch'] == 'all') {
-      configuration['arch'] = 'ia32,x64,simarm,simarm64,simmips';
+      configuration['arch'] = 'ia32,x64,simarm,simarm64,simmips,simdbc';
     }
     if (configuration['mode'] == 'all') {
       configuration['mode'] = 'debug,release,product';
     }
 
     if (configuration['report_in_json']) {
       configuration['list'] = true;
       configuration['report'] = true;
     }
 
@@ skipping 187 matching lines @@
       if (option.keys.contains(name)) {
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
   List<_TestOptionSpecification> _options;
 }