Log Message:
Update to pixman-0.15.2 from 0.12.0

Upstream changes (since 0.12.0):
  - Fix MMX & SSE intrinsics to work with Sun compilers & Solaris
  - More SSE2 optimizations
  - Optimize rectilinear nearest-neighbour scaling
  - Add support for BGRA and BGRx formats
  and a lot of minor bug fixes and optimizations

Oked by wiz@