Comment # 6 on bug 890834 from Jigish Gohil

See:
https://build.opensuse.org/package/view_file/openSUSE:Factory:Live/kiwi-config-openSUSE/xdm-liveinstall.patch

Without these changes installer does not launch on live media when that option
is selected from the boot menu.

This patch is applied when building live images using kiwi, and it is reverted
via post install script /usr/bin/correct_live_for_reboot

if cat /proc/cmdline | grep -q liveinstall && mount | grep -q livecd;

Adding "grep -q livecd" is needed if the patch is applied permanently and not
reverted.