Bump Version to 7.8.1

Signed-off-by: Omar Einea <eineao@gmail.com>
Change-Id: I27e568b487fcaa4922c0c341d9478905b7ae3ac0
Modified APNs for Plus.pl, Orange SK, and Vodafone AU per
CYAN-5208
BACON-1060
BACON-1089

Change-Id: Ide8982a78a4fc070724aa3904c65f18e1f705750