BUGS: clean up and +/etc/mtab entry
mkinitramfs-ll.{ba,z}sh: minor /etc/mtab fix

This file should be readable and not symlinked to /proc/mounts to avoid
its creatation on each boot.
mkinitramfs-ll.{ba,z}sh: kernel module expression

Fix kernel module extended regular expression, this previous
*<module>*.ko could possible match unwanted module (e.g. video).
So removed '*', now zsh will match '-*' more than <module-name>
and there is no way to do the same for bash script. So module
should be explicitely listed for bash script.