[milo] add milo version to page base

milo/frontend/expectations/swarming.build-build-pending.html

Index: milo/frontend/expectations/swarming.build-build-pending.html
diff --git a/milo/frontend/expectations/swarming.build-build-pending.html b/milo/frontend/expectations/swarming.build-build-pending.html
index 507a432b62f2a562903e97d03f284a347062820f..0f0cee2ba801f455c3bb73e73e17f6486e9c8be3 100644
--- a/milo/frontend/expectations/swarming.build-build-pending.html
+++ b/milo/frontend/expectations/swarming.build-build-pending.html
@@ -146,7 +146,8 @@ $(document).ready(function() {
     <hr>
     <a href="https://github.com/luci">luci</a>,
     working for the <a href="https://chromium.org/">Chromium</a> project.<br>
-    Page built: <b><span class="local-time" data-timestamp="-6792498672871">Saturday, 03-Feb-01 04:05:06 UTC</span></b>
+    built: <b><span class="local-time" data-timestamp="-6792498672871">Saturday, 03-Feb-01 04:05:06 UTC</span></b><br>
+    version: <b>testVersionID</b><br>
   </footer>
 <script>
 (function () {