Add footer link to report a bug

Summary:
According to http://www.phabricator.com/docs/phabricator/article/Give_Feedback!_Get_Support!.html, we love feedback.
But there is no way to provide it without reading the docs.

Test Plan: Clicked the link.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin, ldemailly

Differential Revision: https://secure.phabricator.com/D2975

Author: vrana

src/view/page/PhabricatorStandardPageView.php

@@ -323,6 +323,11 @@ protected function getBody() {
     $version = PhabricatorEnv::getEnvConfig('phabricator.version');
     $foot_links[] = phutil_escape_html('Phabricator '.$version);
 
+    $foot_links[] =
+      '<a href="https://secure.phabricator.com/maniphest/task/create/">'.
+        'Report a Bug'.
+      '</a>';
+
     if (PhabricatorEnv::getEnvConfig('darkconsole.enabled') &&
        !PhabricatorEnv::getEnvConfig('darkconsole.always-on')) {
       if ($console) {