Add client/tests/client web tests to the test.dart test script.

client/tests/client/test_config.dart

+// 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("client_test_config");
+
+#import("../../../tools/testing/dart/test_suite.dart");
+
+class ClientTestSuite extends StandardTestSuite {
+  ClientTestSuite(Map configuration)
+      : super(configuration,
+              "client",
+              "client/tests/client",
+              ["client/tests/client/client.status"]);
+
+  void isTestFile(String filename) => filename.endsWith("_tests.dart");
+
+  void listRecursively() => true;
+}