Current xbuild for mips64

[Sean Bruno]

I'm running a build via qemu for mips64.  I see a list of slowly growing
failures for this architecture.  If you are bored and want to take a
stab at looking into them, here is the current build:


http://chips.ysv.freebsd.org/index.html

sean

p.s. libffi/pyton are the biggest blockers here (patches can be found at
https://phabric.freebsd.org/D428 pending review/regression test).

pcre, cmake and libxml2 are probably the next targets for anyone looking
to explore.