fix osmo_gsm48_classmark* libosmogsm.map entries

When the initial patch was tweaked from osmo_classmark_* to
osmo_gsm48_classmark_* naming, the libosmogsm.map entries were forgotten to be
changed as well.

Change-Id: I53a41b5e965a529d3c146ee85102f7f1725c6014
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index ae7c0a1..48757a7 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -583,12 +583,12 @@
 osmo_lu_type_names;
 osmo_cm_service_type_names;
 
-osmo_classmark_is_r99;
-osmo_classmark1_is_r99;
-osmo_classmark2_is_r99;
-osmo_classmark_supports_a5;
-osmo_classmark_a5_name;
-osmo_classmark_update;
+osmo_gsm48_classmark_is_r99;
+osmo_gsm48_classmark1_is_r99;
+osmo_gsm48_classmark2_is_r99;
+osmo_gsm48_classmark_supports_a5;
+osmo_gsm48_classmark_a5_name;
+osmo_gsm48_classmark_update;
 
 local: *;
 };