LCLS: add gsm0808_create_ass2()

It allows setting additional assignment parameters explicitly.

Change-Id: Id89765df3f8c12f55f73f1d7a9d90c8883eb3bba
Related: OS#2487
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 94ae76a..959d182 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -150,6 +150,7 @@
 gsm0808_cause_name;
 gsm0808_cause_class_name;
 gsm0808_create_ass;
+gsm0808_create_ass2;
 gsm0808_create_assignment_completed;
 gsm0808_create_ass_compl;
 gsm0808_create_assignment_failure;