Fix for wrong liblight define
But lots of people are using it, so...

Change-Id: Ibcdf86bd5907e307bde5a103fdc667fe034a1c0f
gralloc: Use new ION API by default

This conditionally reverts commit b519bb243a1537f7420a2e81bbfa91d38d4ae8dc
and reverses the logic to use OLD_ION_API since NEW_ION_API
is the default.

Change-Id: I3708dff82207844302431296ccfc29421d104442

Conflicts:
	libgralloc/Android.mk
	libgralloc/ionalloc.cpp