Possible arguments: (none), fc, fcfontsdir (default), fontsdir, none

Adds a runtime dependency on tools needed to register fonts. Depending on the argument, add a @fc ${FONTSDIR} line, @fcfontsdir ${FONTSDIR} line, @fontsdir ${FONTSDIR} line, or no line if the argument is none, to the plist. FONTSDIR defaults to ${PREFIX}/share/fonts/${FONTNAME} and FONTNAME to ${PORTNAME}. Add FONTSDIR to PLIST_SUB and SUB_LIST