Doc change: add query param to force refresh in proxy caches.

Change-Id: I7bbec536bba7878ef9b5fdc91a25a47437e276ed
diff --git a/tools/droiddoc/templates-sdk/docpage.cs b/tools/droiddoc/templates-sdk/docpage.cs
index bfbe074..4d1404b 100644
--- a/tools/droiddoc/templates-sdk/docpage.cs
+++ b/tools/droiddoc/templates-sdk/docpage.cs
@@ -194,10 +194,10 @@
 
 <?cs include:"trailer.cs" ?>
   <script src="https://developer.android.com/ytblogger_lists_unified.js" type="text/javascript"></script>
-  <script src="<?cs var:toroot ?>jd_lists_unified.js" type="text/javascript"></script>
-  <script src="<?cs var:toroot ?>jd_extras.js" type="text/javascript"></script>
-  <script src="<?cs var:toroot ?>jd_collections.js" type="text/javascript"></script>
-  <script src="<?cs var:toroot ?>jd_tag_helpers.js" type="text/javascript"></script>
+  <script src="<?cs var:toroot ?>jd_lists_unified.js?v=2" type="text/javascript"></script>
+  <script src="<?cs var:toroot ?>jd_extras.js?v=2" type="text/javascript"></script>
+  <script src="<?cs var:toroot ?>jd_collections.js?v=2" type="text/javascript"></script>
+  <script src="<?cs var:toroot ?>jd_tag_helpers.js?v=2" type="text/javascript"></script>
 
 </body>
 </html>