Ubuntu 16.10 has pie enable by default. This causes a build failure with
syslinux.
https://bugs.launchpad.net/ubuntu/+source/syslinux/+bug/1579023
Signed-off-by: Ryan Coe <bluemrp9@gmail.com>
[Thomas: improve patch description.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
