move f_gprs_tlli_{type,random} to Osmocom_Gb_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: I6fc41ed94e97e0ec44dc4ea56d110bdd9ac77a72
2 files changed