sgsn: Add missing LF in log message

Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/gprs/gprs_sgsn.c b/openbsc/src/gprs/gprs_sgsn.c
index d5c02fd..f3da038 100644
--- a/openbsc/src/gprs/gprs_sgsn.c
+++ b/openbsc/src/gprs/gprs_sgsn.c
@@ -475,7 +475,7 @@
 		return;
 	}
 
-	LOGMMCTXP(LOGL_INFO, mmctx, "Subscriber data update");
+	LOGMMCTXP(LOGL_INFO, mmctx, "Subscriber data update\n");
 
 	if (!subscr->sgsn_data->mm && !mmctx->subscr) {
 		mmctx->subscr =	subscr_get(subscr);