cairo rebuild needed on x86_64

[Ken Brown]

Yaakov,

I don't know if you saw 
http://cygwin.com/ml/cygwin-apps/2013-07/msg00229.html, but Jon found 
the cause of a bug that you and I both ran into.  The bug has been fixed 
in cygwin-1.7.22, but we need a rebuild of libcairo2 on x86_64 in order 
to take advantage of the fix.

Thanks.

Ken