Mark BROKEN: fails to build after CVE-2017-16611 fix to libXfont

making all in programs/fontaliases/freebsd/C...
/usr/local/bin/bdftopcf -t dtinfo.bdf -o dtinfo.pcf
/usr/local/bin/bdftopcf: can't open bdf source file dtinfo.bdf

Reported by: pkg-fallout