main/librtlsdr: install udev files
Enable also the installation of the udev files required to work with RTL SDRs.
We are currently working on getting Alpine Linux 3.21 out. This means that merge requests that are not aimed to help with that (only affecting testing, new aports) have a lower priority at the moment. Please be patient, they will be eventually picked up.
Enable also the installation of the udev files required to work with RTL SDRs.