Drop use of log_set_print_filename() API inside libosmocore

Let's use log_set_print_filename2() API instead, which has less ackward
behavior implications like changing the print status of category-hex.

Related: OS#5034
Change-Id: Ifc78e1dcba5baf0b41f6ccbbbd1e3f06552d73da
diff --git a/utils/osmo-ns-dummy.c b/utils/osmo-ns-dummy.c
index ee7f591..0af1a89 100644
--- a/utils/osmo-ns-dummy.c
+++ b/utils/osmo-ns-dummy.c
@@ -227,8 +227,7 @@
 
 	osmo_init_logging2(ctx, &log_info);
 	log_set_use_color(osmo_stderr_target, 0);
-	log_set_print_filename(osmo_stderr_target, 0);
-	log_set_print_filename(osmo_stderr_target, 0);
+	log_set_print_filename2(osmo_stderr_target, LOG_FILENAME_NONE);
 	log_set_log_level(osmo_stderr_target, LOGL_INFO);
 	msgb_talloc_ctx_init(ctx, 0);
 	osmo_stats_init(ctx);