This is needed as prepare_generic_squashfs generates more data (in our
case 0x40004 B) and it's complex for sysupgrade to extract UBI image out
of TRX.
Signed-off-by: Dan Haab <dhaab@luxul.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45541 3c298f89-4303-0410-b956-a3cf2f4a3e73