Add support for the new analyzer to the testing scripts

tools/test.dart

Index: tools/test.dart
===================================================================
--- tools/test.dart	(revision 19852)
+++ tools/test.dart	(working copy)
@@ -144,7 +144,7 @@
         // vm tests contain both cc tests (added here) and dart tests (added in
         // [TEST_SUITE_DIRECTORIES]).
         testSuites.add(new VMTestSuite(conf));
-      } else if (conf['compiler'] == 'dartc') {
+      } else if (conf['analyzer']) {
         if (key == 'dartc') {
           testSuites.add(new SamplesDartcTestSuite(conf));
           testSuites.add(new JUnitDartcTestSuite(conf));