convert openbsc to use libosmocore-0.1.1 API

the 0.1.1 API is cleaned up and removes all exported global static
arrays (like rlm_cause_strs).  There are now proper accessor functions.
diff --git a/openbsc/src/gsm_04_08_utils.c b/openbsc/src/gsm_04_08_utils.c
index 68f34f4..2472f12 100644
--- a/openbsc/src/gsm_04_08_utils.c
+++ b/openbsc/src/gsm_04_08_utils.c
@@ -68,7 +68,7 @@
 				"Sending '%s' to MS.\n", msg->trx->bts->nr,
 				msg->trx->nr, msg->lchan->ts->nr,
 				gh->proto_discr & 0xf0,
-				gsm48_cc_msg_names[gh->msg_type & 0x3f]);
+				gsm48_cc_msg_name(gh->msg_type));
 		else
 			DEBUGP(DCC, "(bts %d trx %d ts %d pd %02x) "
 				"Sending 0x%02x to MS.\n", msg->trx->bts->nr,