merge pixman 0.46.4.

initial import of pixman-0.46.4

initial import of revert to pixman-0.38.4.

see arm64 neon issues, and other issues (eg, PR#57108)

initial import of pixman-0.42.2

initial import of pixman-0.38.4

initial import of pixman-0.38.0

initial import of pixman-0.36.0

initial import of pixman-0.34.0

initial import of pixman-0.32.6

initial import of pixman-0.32.4

initial import of pixman-0.30.0

initial import of pixman-0.28.2

merge pixman 0.23.2

initial import of pixman-0.23.2. important changes include:
- more SSE2 support
- more arm neon and A8 support
- several bug fixes

initial import of pixman-0.21.4. there are a bunch of bug fixes in
here but there's no ChangeLog of what change so ...

merge cornflakes for pixman 0.21.2

initial import of pixman-0.21.2

Import pixman-0.18.4.

Changes since 0.18.2:
Post-release version bump to 0.18.3
Fix memory leak in the pthreads thread local storage code
When storing a g1 pixel, store the lowest bit, rather than comparing with
If we bail out of do_composite, make sure to undo any workarounds.
Check for read accessors before taking the bilinear fast path
Pre-release version bump to 0.18.4

initial import of pixman-0.18.2

initial import of pixman-0.16.2

initial import of pixman-0.15.16

initial import of pixman-0.15.14

initial import of pixman-0.15.10

Update to 0.12.0 for syncing with pkgsrc.

The full changes can be found here:
http://gitweb.freedesktop.org/?p=pixman.git;a=shortlog

initial import of pixman-0.11.4