app: aboot: Add support for CHUNK_FILL type for sparse image

ext4 utils add CHUNK_TYPE_FILL chunk for the sparse images, handle
these chunk types when flashing the sparse image.

FPIIM-2067

CRs-Fixed: 540173
Change-Id: Icc031b5c0a6a66ddf91a0887363928d98dfdd769
1 file changed