SW: add toilet to GRML_SMALL + GRML_FULL and lolcat to GRML_FULL

Disk space requirements:

* lolcat on grml-small: ~28.5 MB of additional disk space
* toilet on grml-small: ~1800 kB of additional disk space

-> so let's only add toilet to GRML_SMALL

* lolcat on grml-full:  ~152 kB of additional disk space
* toilet on grml-full: ~1800 kB of additional disk space

-> it's about 2MB of additional disk space for GRML_FULL in total,
   so we can add both lolcat and toilet without too much overhead