syslinux: bump to 4.05

* bump syslinux from 4.04 to 4.05
* add patch to fix build problem with 4.05, see
http://old.nabble.com/syslinux-fails-to-build-td34112447.html


* add util-linux dependency and make sure the build finds it

Signed-off-by: Aras Vaichas <aras.vaichas@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>