Without --without-x the X11 detection would still go ahead and find the host X11
headers, which seems to cause problems at link time.
(From OE-Core rev: d35d19b6d0844daf8ca8aa059c0aa6077c2f573a)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>