Fix configuration check condition so that the test scripts runs the vm unit tests when running the …

tools/test.dart

Index: tools/test.dart
===================================================================
--- tools/test.dart	(revision 6004)
+++ tools/test.dart	(working copy)
@@ -106,7 +106,7 @@
     if (selectors.containsKey('utils')) {
       queue.addTestSuite(new UtilsTestSuite(conf));
     }
-    if (conf['component'] == 'vm' && selectors.containsKey('vm')) {
+    if (conf['runtime'] == 'vm' && selectors.containsKey('vm')) {
       queue.addTestSuite(new VMTestSuite(conf));
       queue.addTestSuite(new VMDartTestSuite(conf));
     }