display-legacy: clarify COPYBIT == HWC_BLIT

Change-Id: I4e531764a782a583312d3734f4fa0d3a4604b667
Merge "display-legacy: clarify COPYBIT == HWC_BLIT" into jellybean
display-legacy: gralloc: use bionic ion header for qsd8k

Change-Id: Id2842abe5850462aa7b4c962a7dfeb4ae464475b
copybit: use GRALLOC_USAGE_PRIVATE_UI_CONTIG_HEAP for yv12 pixel format.

 * ifdef'd for ion.

Change-Id: I97be5a9d694556b4dbe39cea39109962451db64d
Merge branch 'jellybean-merge' into cm-10.1

Conflicts:
	libgralloc/ionalloc.h

Change-Id: Icb56bea52385665ba1554a9e363f83bbb5fa3c17