hardware_samsung: RIL: update xmm626x and fix mobile data (gateway)

Some function prototypes have been changed, so take the new libril and add samsung specific parts

PS1: updated xmm6262 -> sim is detected but RIL_register receive a null pointer
PS2: updated xmm6260 and add a missing part in PS1
PS4: rebase after https://gerrit.omnirom.org/#/c/10448/
PS5: fix mobile data for xmm6262 and xmm626x ("No such process" error while setting gateway) ->
     I've used http://review.cyanogenmod.org/#/c/80947/ as a reference, all credits to him for mobile data fix
PS6: fix dependencies

Conflicts:
	ril/xmm6260/libril/ril.cpp
	ril/xmm6260/libril/ril_commands.h
	ril/xmm6262/libril/ril.cpp
	ril/xmm6262/libril/ril_commands.h

Change-Id: Ife7fb3fb585e86a9abfe612207c5ab310d0a9e18

Also remember to update RIL to v10 in device_i9300
Conflicts:
	ril/xmm6260/libril/ril.cpp
	ril/xmm6262/libril/ril.cpp