* postmarketos-base: Execute setup-udev, remove mosh from dependencies
* Run setup-udev [0], because that is what `setup-xorg-base` does [1].
It configures more than one OpenRC service and it also messes with the
runlevels. Only after running that, Hildon works (tested in Qemu).
[0]: 2fbea8b8da/main/eudev/setup-udev
[1]: 06300dd483/setup-xorg-base.in (L25)
* Remove `mosh` from `postmarketos-base` dependencies. I don't think anyone
uses it right now, and it's easy to add custom packages in `pmbootstrap init`
nowadays.
* Minor style changes in the `APKBUILD`
* [rx51] Remove udev-trigger service start