Rename test.dart component to specify compiler + runtime.

tools/test.dart

Index: tools/test.dart
===================================================================
--- tools/test.dart	(revision 5854)
+++ tools/test.dart	(working copy)
@@ -52,7 +52,7 @@
   var startTime = new Date.now();
   var optionsParser = new TestOptionsParser();
   List<Map> configurations = optionsParser.parse(new Options().arguments);
-  if (configurations == null) return;
+  if (configurations == null || configurations.length == 0) return;
 
   // Extract global options from first configuration.
   var firstConf = configurations[0];
@@ -71,7 +71,8 @@
     StringBuffer sb = new StringBuffer('Test configuration');
     sb.add(configurations.length > 1 ? 's:' : ':');
     for (Map conf in configurations) {
-      sb.add(' ${conf["component"]}_${conf["mode"]}_${conf["arch"]}');
+      sb.add(' ${conf["compiler"]}_${conf["runtime"]}_${conf["mode"]}_' + 
+          '${conf["arch"]}');
       if (conf['checked']) sb.add('_checked');
     }
     print(sb);