gralloc: Mark framebuffer as ION memory

Change-Id: I859d4d03b62279b7e66ba52e3215fe7394a63434
gralloc: don't link libgenlock if BSP_WITH_GENLOCK isn't enabled

and also remove unneded genlock include

Change-Id: Ia9b8b3848a4bbe59f7c5b8b0ab6432a8aeb9947d

Conflicts:

	libgralloc/Android.mk
libcopybit: Add missing return statement