cantarell-fonts: Rename cantarell-fonts-ttf to cantarell-fonts

Rename and improve recipe.
cantarell-fonts: Force the autohinter as it does not have TT hinting

Add fontconfig configuration to force the autohinter, just like
Archlinux does.
Move cantarell-fonts to recipes-graphics

Move to a more suitable location.
Move dejavu-fonts-ttf to recipes-graphics

Move to a more suitable location.
dejavu-fonts-ttf: Fix fontconfig configuration files path

Install fontconfig configuration files into /etc/fonts/conf.d.