support the XOR algorithm for UMTS AKA

Test USIMs as specified by 3GPP use the XOR algorithm not only for 2G
but also for 3G.  libosmocore includes the XOR-3G support since v1.3.0,
but osmo-hlr somehow never made use of it.

Change-Id: I3a452af9c18cd90d00ab4766d6bd1679456bc1a2
Closes: OS#4924
5 files changed