Changes

Make compatible with libosmocore >= 1.10.0

Work towards preparing a release tag for libosmo-gprs, as osmocom-bb
is now in osmocom:latest but cannot build due to the missing
libosmo-gprs dependency.

libosmo-gprs currently doesn't build against latest stable libosmocore,
because it uses new enum values introduced in libosmocore master. Add
defines for these temporarily, until a new libosmocore version is
released and libosmo-gprs can depend on it.

Related: osmocom-bb Ifbfaead7ae89d9ac747d1bb495f061c5cbe7a241
Related: fbdcd28 ("gmm: gprs_gmm_att_tlvdef: Add newer definitions…")
Change-Id: I7476f1c7915770d6529104a7a58cb8c16a371ddd