a reason for doing that is that you can just pack together targets into
a array and pass them to our helper, and the helper will just handle
them, so even module with eldbus codegen etc is now supported.
This also means that we are just passing the src object directly into
the shared_module call, which means the user of our helper can just pack
everything he needs into the src var and the helper does not need to
know about it.
now their build fiels are super easy to maintan. we should expand this
kind of ptterning aross the e build and then expand it to handle new
patters where needed like custom binaries (setuid or not), etc etc.