gbproxy: update sns configuration to use ip-sns-bind

With libosmocore commit the SNS configuration requires a ip-sns-bind vty configuration
to define the binds which should be use.

Related: SYS#5354
Depends-on: I9ab8092bf286e7d90e92f5702a5404425e959c84 (libosmocore)
Change-Id: If86fe463199bc5089db80a0dcc01f9e94e23e9b9
2 files changed