gsm0408: Completing GSM 04.08 RR message types

- Add missing message types to be up to date with the
  latest specification release (3GPP TS 04.18)

- Add value strings to translate RR message type identifiers
  into human readable strings. (see gsm48_rr_msg_name() in
  gsm48.h

Change-Id: I3ceb070bf4dc8f5a071a5d43c6aa2d4e84c2dec6
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index a83f92c..f0baa21 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -151,6 +151,7 @@
 
 gsm48_att_tlvdef;
 gsm48_cc_msg_name;
+gsm48_rr_msg_name;
 gsm48_cc_state_name;
 gsm48_construct_ra;
 gsm48_hdr_gmm_cipherable;