Don't run fc-cache, we're using the fonts of the X server and the native
fontconfig (or the fonts ports/packages) are supposed to run fc-cache.
I also noticed it has problems with some fonts, so we may end up with a
not complete cache in this version.
This should fix the build on pointyhat (cache files left after pkg_delete).
While I'm here use a link to the native fonts.conf, we don't need our