Track libosmocore API change in osmo-msc.

struct gsm0808_cell_id_list in libosmocore is deprecated by
https://gerrit.osmocom.org/#/c/6509/

This updates the only API user I am aware of.

Change-Id: I67377270cf3b081ac5dc9cd7b4dc28f74143753a
Depends: Ib7e754f538df0c83298a3c958b4e15a32fcb8abb
1 file changed