gprs_bssgp_rim: add value strings for enum bssgp_rim_routing_info_discr

Change-Id: Idd06d2e3df0d60409a89a474018a9d97f7772090
Related: SYS#5103
diff --git a/src/gb/libosmogb.map b/src/gb/libosmogb.map
index 23d52a2..b4d7fdb 100644
--- a/src/gb/libosmogb.map
+++ b/src/gb/libosmogb.map
@@ -34,6 +34,7 @@
 bssgp_parse_rim_pdu;
 bssgp_parse_rim_ri;
 bssgp_ran_inf_app_id_strs;
+bssgp_rim_routing_info_discr_strs;
 bssgp_set_bssgp_callback;
 bssgp_tx_bvc_block;
 bssgp_tx_bvc_reset;