Log Message:
Update pycairo to 1.8.4.
Based on maintainer update request by PR 41063.
While here, add commented out LICENSE (LGPL-2.1 or MPL-1.1).

Overview of changes from pycairo 1.8.2 to pycairo 1.8.4
=======================================================
General Changes:
    Pycairo 1.8.4 requires cairo 1.8.4 (or later) and Python 2.6

Bug Fixes:
    20674: Add get/set_extend for Gradient Patterns

New Classes:
    cairo.ToyFontFace

New Methods:
    Pattern.get_extend
    Pattern.set_extend
    ToyFontFace.get_family
    ToyFontFace.get_slant
    ToyFontFace.get_weight

Deleted Methods:
    SurfacePattern.get_extend
    SurfacePattern.set_extend

Other Changes:
    Threading for surfaces with stream functions has been reenabled.
    Documentation updates.