add flag for handling custom updaters

Change-Id: I75e9c83ac483278f8c38fc675140f92c3d261998
motorola_msm8960: update block dev handling

Change-Id: Id35371e6f7385336824ae8c7db75c0777d125deb
samsung_msm8960-common: update block dev handling

Change-Id: I566c5dbcb1948dc08afa0e0739a495f6c144f7e1
splashmenu: key configs

Change-Id: Ibfefc498ae0cb78825cd9595c77dd3f7ac038da2
v3.54

Change-Id: Ib1bb0226b7fc563ec8805dee1dda8eacc43685f2