The sulogin tool doesn't compile because it cannot find shadow.h. As the
tool is not available in openwrt it is now not selected during the build
process.
Signed-off-by: Tjalling Hattink <t.hattink@fugro.nl>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40930 3c298f89-4303-0410-b956-a3cf2f4a3e73