[Fontconfig] broken caches

[Matthias Clasen]

I secured evidence of broken caches being created occasionally
by the fontconfig mmap snapshot in Fedora Rawhide. I won't have
time to look into the exact nature of the problem today, but
I have put a tarball up here: 

http://people.redhat.com/mclasen/bad-caches.tar.gz 

It also contains the fonts that were used to create the caches
on an i686 machine. The output of fc-cat looks as if the charset
fields contain garbage.

Regards,

Matthias