abis_nm: introduce abis_nm_{osmo,ipa}_magic[]

... used to be oml_{osmo,ipa}_magic in osmo-bts
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index cab4fc4..da04d2b 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -20,6 +20,8 @@
 abis_nm_severity_name;
 abis_nm_sw_load_msgs;
 abis_nm_test_name;
+abis_nm_osmo_magic;
+abis_nm_ipa_magic;
 
 osmo_sitype_strs;