gbproxy: fix formatting in gbproxy-state command

In ctrl protocol we don't need any explicit formatting as it might
interfere with client processing our response. Let's drop trailing '\n'.

Change-Id: I3f32e01dd50a53991c292aeee57a78d81cdc5429
Related: SYS#2655
diff --git a/src/gprs/gb_proxy_ctrl.c b/src/gprs/gb_proxy_ctrl.c
index 032d8d4..694a2f7 100644
--- a/src/gprs/gb_proxy_ctrl.c
+++ b/src/gprs/gb_proxy_ctrl.c
@@ -64,7 +64,7 @@
 		struct gprs_ra_id raid;
 		gsm48_parse_ra(&raid, peer->ra);
 
-		cmd->reply = talloc_asprintf_append(cmd->reply, "%u,%u,%u,%u,%u,%u,%s\n",
+		cmd->reply = talloc_asprintf_append(cmd->reply, "%u,%u,%u,%u,%u,%u,%s",
 				peer->nsei, peer->bvci,
 				raid.mcc, raid.mnc,
 				raid.lac, raid.rac,