Add the frog test suites to the dart test scripts.

frog/tests/leg_only/test_config.dart

Index: frog/tests/leg_only/test_config.dart
diff --git a/frog/tests/leg_only/test_config.dart b/frog/tests/leg_only/test_config.dart
new file mode 100644
index 0000000000000000000000000000000000000000..9ddd80c3feb2a1dd22c1626a1ee9dc66c6af3983
--- /dev/null
+++ b/frog/tests/leg_only/test_config.dart
@@ -0,0 +1,16 @@
+// Copyright (c) 2011, 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("leg_only_test_config");
+
+#import("../../../tools/testing/dart/test_suite.dart");
+
+class LegOnlyTestSuite extends StandardTestSuite {
+  LegOnlyTestSuite(Map configuration)
+      : super(configuration,
+              "frog/tests/leg_only/src",
+              ["frog/tests/leg_only/leg_only.status"]);
+
+  List<String> additionalOptions() => ['--leg_only'];
+}