add missing mod

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@5833 d0543943-73ff-0310-b7d9-9358b9ac24b2

build/modules.conf.in

@@ -4,6 +4,7 @@ applications/mod_commands
 applications/mod_conference
 applications/mod_dptools
 applications/mod_enum
+applications/mod_fifo
 #applications/mod_ivrtest
 #applications/mod_soundtouch
 #applications/mod_rss