make rate_counters work

if we don't call rate_ctr_init(), the rate counter internal timer will
not tick,a nd we will never get the per-s/per-m/per-h averages.

Change-Id: Ib5b66c72079330ac161756bcf562d27536d7ce44

src/osmo-e1d.c

@@ -175,6 +175,7 @@ int main(int argc, char *argv[])
 	vty_init(&vty_info);
 	logging_vty_add_cmds();
 	e1d_vty_init(e1d);
+	rate_ctr_init(e1d);
 
 	handle_options(argc, argv);