Use osmo_clock_gettime from libosmocore

Change-Id: Ic638849c6687c376c4c0c36cc286d499a073d6ca
diff --git a/src/gprs/gb_proxy_vty.c b/src/gprs/gb_proxy_vty.c
index d7d35fe..cd10abf 100644
--- a/src/gprs/gb_proxy_vty.c
+++ b/src/gprs/gb_proxy_vty.c
@@ -491,7 +491,7 @@
 	time_t now;
 	struct timespec ts = {0,};
 
-	clock_gettime(CLOCK_MONOTONIC, &ts);
+	osmo_clock_gettime(CLOCK_MONOTONIC, &ts);
 	now = ts.tv_sec;
 
 	llist_for_each_entry(peer, &g_cfg->bts_peers, list) {
@@ -727,7 +727,7 @@
 
 	state = &peer->patch_state;
 
-	clock_gettime(CLOCK_MONOTONIC, &ts);
+	osmo_clock_gettime(CLOCK_MONOTONIC, &ts);
 	now = ts.tv_sec;
 
 	if (match == MATCH_STALE) {