add osmo_ss7_gtt to app file
diff --git a/ebin/osmo_ss7.app b/ebin/osmo_ss7.app
index 5d1a2b1..931c1a9 100644
--- a/ebin/osmo_ss7.app
+++ b/ebin/osmo_ss7.app
@@ -8,6 +8,7 @@
 			m2ua_codec,
 			mtp3_codec,
 			sccp_codec, sccp_scoc,  sccp_scrc,
+			osmo_ss7_gtt,
 			osmo_ss7_pcap
 		]},
 	 {registered, []},