update brand icons

lib/views/admin/security.html

@@ -233,16 +233,16 @@
               <a href="#passport-ldap" data-toggle="tab" role="tab"><i class="icon-organization"></i> LDAP</a>
             </li>
             <li>
-              <a href="#passport-google-oauth" data-toggle="tab" role="tab"><i class="icon-social-google"></i> Google OAuth</a>
+              <a href="#passport-google-oauth" data-toggle="tab" role="tab"><i class="fa fa-google"></i> Google OAuth</a>
             </li>
             <li>
-              <a href="#passport-facebook" data-toggle="tab" role="tab"><i class="icon-social-facebook"></i> Facebook</a>
+              <a href="#passport-facebook" data-toggle="tab" role="tab"><i class="fa fa-facebook"></i> Facebook</a>
             </li>
             <li>
-              <a href="#passport-twitter" data-toggle="tab" role="tab"><i class="icon-social-twitter"></i> Twitter</a>
+              <a href="#passport-twitter" data-toggle="tab" role="tab"><i class="fa fa-twitter"></i> Twitter</a>
             </li>
             <li>
-              <a href="#passport-github" data-toggle="tab" role="tab"><i class="icon-social-github"></i> Github</a>
+              <a href="#passport-github" data-toggle="tab" role="tab"><i class="fa fa-github"></i> Github</a>
             </li>
           </ul>