add iOS PVRTC extension interface
add iOS PVRTC extension interface

stardazed/stardazed-tx,zenmumbler/libzm,zenmumbler/stardazed-tx,stardazed/stardazed-tx,stardazed/stardazed-tx,zenmumbler/stardazed-tx,zenmumbler/libzm,zenmumbler/libzm,zenmumbler/stardazed-tx,stardazed/stardazed,zenmumbler/libzm,stardazed/stardazed,zenmumbler/stardazed-tx