Log Message:
Update to 1.8.10:

Overview of changes from pycairo 1.8.8 to pycairo 1.8.10
========================================================
General Changes:
    Pycairo 1.8.10 requires cairo 1.8.10 (or later).

New Classes/Types:
    Win32PrintingSurface
    XCBSurface - add XCB support using xpyb

Bug Fixes:
    Fix for libtool 2.2 (#27974).
    Mingw32 and pypy fixes (#25203).

Other Changes:
    Tests updated.

The Win32PrintingSurface and XCBSurface changes mean that pycairo 1.8.10 is
not binary compatible with pycairo 1.8.8. So modules that use the pycairo C
API (like pygtk) will need to be recompiled to use pycairo 1.8.10.