Require newer versions of dependencies

New APIs only available since libgtp 1.4.0 are needed, and in turn that
libgtp version requires newer libosmocore 1.1.0.

osmo-sgsn itself requires libosmocore 1.2.0 since it uses GSM23003_TMSI_SGSN_MASK.

Change-Id: I1c67d3e7dda093b4869756c7a63dc7a4549084ae
2 files changed