[cairo] win32 build

[Jason Dorje Short]

Carl Worth wrote:

>>the win32 surface works with it applied (by "works" I mean
>>cairo-snippets runs).
> 
> Sadly, I think that's the best test we have right now for the win32
> backend. It would certainly be nice to have something automated but
> Owen expressed some concerns about this not being
> easy/possible/beneficial.

It's not automated but it would probably be easy enough to fix up xsvg
to run on win32 with the win32 backend.

-jason