At the moment we have Contributor: lines on some packages (but not all of them),
but often they don't represent the actual contributors to the package very well.
E.g. when we added them retroactively to the device packages we only added
the initial contributor (which isn't necessarily the person
who made most of the work for a device...)
The Git history is the most representative source for figuring out
who contributed to a package, so there is no reason to duplicate that
into the APKBUILD.
[skip ci]: way too many packages
Stop manually making the build dir in a custom prepare() function, but
rather use the CMake -B argument to automatically make this directory.
[ci:skip-vercheck]: since this doesn't change the resulting package
compared to our previous APKBUILD a pkgrel bump is not necessary.
[ci:skip-build]: already built successfully in CI
