[arch-dev-public] Python 3.10 rebuilds

[Evangelos Foutras]

For the next few days we'll be doing (semi-automated) rebuilds for Python
3.10. Please avoid adding new Python packages and starting other rebuilds
during this time. *This is a strong suggestion in order to minimize the
pain of this huge rebuild.*

Some PKGBUILDs were modified in /trunk to use the Python 3.10 site-packages
path (among other tweaks). Building those against Python 3.9 might fail or
produce incorrect packages. The affected packages are listed in the
following two commits and care should be taken when updating them while the
Python rebuild is ongoing.

https://lists.archlinux.org/pipermail/arch-commits/2021-November/1084956.html
https://lists.archlinux.org/pipermail/arch-commits/2021-November/1084957.html