Remove the need for the header file to be exported - we don't need most
of it anyway; all we care about are the offset of the rootfs length and
header crc fields.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44557 3c298f89-4303-0410-b956-a3cf2f4a3e73