sys-apps/system76-driver-20.04.51: Switch to PEP517-style build
Update the ebuild to be PEP517-compliant:
>>> Preparing source in /var/tmp/portage/sys-apps/system76-driver-20.04.51/work/system76-driver-20.04.51 ...
* Applying system76-driver-20.04.30-gentoo.patch ...
* Non-PEP517 builds are deprecated for ebuilds using plain distutils.
* Please migrate to DISTUTILS_USE_PEP517=setuptools.
* Please see Python Guide for more details:
* https://projects.gentoo.org/python/guide/distutils.html