SW: Move firmware packages to GRMLBASE

We want to have the firmware packages on all Grml based ISOs.

List based on output generated via:

  ( echo -e '\n# firmware packages' ;  apt-cache search firmware | \
    awk '$1 ~/(^firmware|firmware$|firmware-linux-free|firmware-linux-nonfree$)/{print $1}' | \
    egrep -v '(midisport|wlan-ng|installer|crystal|ivtv)' | sort ) >> GRMLBASE

Signed-off-by: Michael Prokop <mika@grml.org>