Renames pre-upgrade script to post-upgrade script for non-freefirmware
subpackage.
This script creates stub files for where the waveform firmware should
be. When upgrading from 13-r0, the script detects files being there,
thus does not create the stub files. Unfortunately, since before
15-r0 those files are "owned" by the subpackage, they are removed
when upgrading, and thus the stub files are never created by the
pre-upgrade. By making this script post-upgrade, it'll recreate the
empty stub files so that the actual waveforms can be extracted by
the systemd / openrc boot-up service.
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8827>
Antoine Martin
2a902da452