Update searchable_list test to run in package bots

test/demo_app_test.html

Index: test/demo_app_test.html
diff --git a/test/demo_app_test.html b/test/demo_app_test.html
index bd1852f5002818eda950d313468eabc27f811ded..a35745f3e0dd87d4523e97a27d4d661be7465c43 100644
--- a/test/demo_app_test.html
+++ b/test/demo_app_test.html
@@ -9,9 +9,7 @@ BSD-style license that can be found in the LICENSE file.
   <!--polymer-test: this comment is needed for test_suite.dart-->
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
-  <script src="packages/web_components/platform.js"></script>
-  <script src="packages/web_components/dart_support.js"></script>
-  <link rel="import" href="../web/elements/demo_app.html">
+  <link rel="import" href="packages/searchable_list/demo_app.html">
   <script src="/root_dart/tools/testing/dart/test_controller.js"></script>
   <title>Demo App test</title>
 </head>