[cairo] Road to pixman 0.16.0

[Rainman Lee]

>
> Let me know if I missed anything.
>

I thought the performance for rotating should be improved, especially
on windows.
I run a test which painted a rotated image pattern from 0 degree to
360 degree, with fast filter, and no antialias.
cairo takes 3448ms, but GDI+ takes only 1411ms, more than two times
faster than cairo!
most of time is spent in pixman, so I greatly wish the new version of
pixman could fix it :@)

thank you!

Rainman