x11/pixman: Update to 0.42.2

Release notes (0.42.0): https://lists.freedesktop.org/archives/pixman/2022-October/004993.html
Release notes (0.42.2): https://lists.freedesktop.org/archives/pixman/2022-November/004994.html

For now disable neon on aarch64, it's borked.

PR: 67538
Security: CVE-2022-44638
Sponsored by: Beckhoff Automation GmbH & Co. KG