A bunch of packages such as sispctl look for libusb-config to find it, install
libusb-config in staging_dir/*/host/bin which is in the TARGET_PATH.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39975 3c298f89-4303-0410-b956-a3cf2f4a3e73