move f_gen_{imsi,imei,msisdn} from L3_Templates to Osmocom_Types

Those functions don't depend on any L3 specific data structurs, and
it is not a good idea to burden every user with having to impot all
of a 2G/3G Layer3 just to generate some hexstring identifiers.

Change-Id: I7880633a46afc607f16f8aa6ea1a277f7958c95b
2 files changed