SW: add console-data and kbd to GRMLBASE.

New daily images miss the keymap files in /usr/share/keymaps.
Therefore loadkeys us/de does not work.

This is due to the change noted in changelog of kbd 1.15.2-2:

   * Prefer console-setup over console-data and console-common.  This is part
     of a d-i related fix and helps avoid that both console-setup-udeb and
     console-data ask the user for their preferred keyboard layout (by simply
     not installing console-data by default).  Thanks to Julien Cristau,
     closes: #606186.

We need to explicitly install console-data.

Also add kbd explicitly to GRMLBASE (see commit
bfd1dd6883965c8709c5db7c834d35c45972636a for the console-tools->kbd migration),
so it's not just available if NFSROOT/base.tgz is being used but always.

Thanks: Christian Hofstaedtler <ch@grml.org>
Thanks: Marc Haber
Closes: issue944