Rename: {a12k12,xmarufont} -> xfonts-{a12k12,marumoji}

[Fumitoshi UKAI <ukai@debian.or.jp>]

Hi,

Many X fonts packages use xfonts-* as its package name, so I'd like to
rename my maintaining 2 X fonts package, a12k12 and xmarufont, 
to xfonts-a12k12 and xfonts-marumoji.

Best Regards,
Fumitoshi UKAI