Log Message:
Update to 0.30.0. Adapt patch-b[bc] to changes.
XXX: these patches should go away, or be fed upstream.

A new major release 0.30.0 of the pixman rendering library is now
available. Highlights of this release:

- Support for high-quality image downscaling [Søren]
- Much improved ARMv6 assembly [Ben Avison]
- Improved rendering quality for gradients [Søren]
- Improvements to the SSE2 backend [Chris Wilson, Siarhei Siamashka]
- Improvements to MIPS DSPr2 backend [Nemanja Lukic]
- Improvements to test suite [Siarhei, Søren Sandmann]