use osmo_init_logging2

Change-Id: Ic38fff17cc985238b91999c8acdd92d22fd28c72
diff --git a/ggsn/ggsn.c b/ggsn/ggsn.c
index df071d2..cb11c49 100644
--- a/ggsn/ggsn.c
+++ b/ggsn/ggsn.c
@@ -1073,7 +1073,7 @@
 	signal(SIGUSR2, &signal_handler);
 
 	osmo_init_ignore_signals();
-	osmo_init_logging(&log_info);
+	osmo_init_logging2(tall_ggsn_ctx, &log_info);
 	osmo_stats_init(tall_ggsn_ctx);
 
 	vty_init(&g_vty_info);