Add support for client/dartc compilation only tests.

tools/test.dart

Index: tools/test.dart
diff --git a/tools/test.dart b/tools/test.dart
index f1af2b6f1bdea78128d25ae7270f52ed64e6e293..62d1f48600179169e3cf9212d4a588fd7bd1a227 100755
--- a/tools/test.dart
+++ b/tools/test.dart
@@ -16,6 +16,7 @@
 #import("../tests/stub-generator/test_config.dart");
 #import("../runtime/tests/vm/test_config.dart");
 #import("../samples/tests/samples/test_config.dart");
+#import("../client/tests/dartc/test_config.dart");
 #import("../frog/tests/frog/test_config.dart");
 #import("../frog/tests/leg/test_config.dart");
 #import("../frog/tests/leg_only/test_config.dart");
@@ -72,6 +73,9 @@ main() {
     if (selectors.containsKey('leg_only')) {
       queue.addTestSuite(new LegOnlyTestSuite(conf));
     }
+    if (selectors.containsKey('dartc')) {
+      queue.addTestSuite(new ClientDartcTestSuite(conf));
+    }
 
     return true;
   }