Load the configfs module for /sys/kernel/config mount

Load the configfs module for /sys/kernel/config mount

targetcli.service (from the targetcli-fb package) requires
sys-kernel-config.mount unit (configfs mounted at /sys/kernel/config).
With the default systemd-provided units that is started only when
/sys/kernel/config directory extists on boot - that is when configfs is
compiled into kernel or the module is loaded from /etc/modules-load.d

The systemd-configfs.patch changes the behaviour so
sys-kernel-config.mount unit will attempt to load the 'configfs' module
when needed (honouring any module blacklist).

Release: 8