Some kernel images need to be wrapped in a loader, which cannot be built
without a working toolchain.
Also, this speeds up the image builder run.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45836 3c298f89-4303-0410-b956-a3cf2f4a3e73