edit default file to include mod_opal

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10736 d0543943-73ff-0310-b7d9-9358b9ac24b2

build/modules.conf.in

@@ -39,6 +39,7 @@ endpoints/mod_sofia
 endpoints/mod_loopback
 #endpoints/mod_woomera
 #endpoints/mod_alsa
+#endpoints/mod_opal
 #../../libs/openzap/mod_openzap
 #event_handlers/mod_event_multicast
 event_handlers/mod_event_socket