It was the runtime library discussion that caught my eye and brought me here. In addition to resolving that issue on Linux, it would be very helpful to start the work of sending patches upstream to LLVM (and any other tools forked and modified) to enable Swift support natively and not have to compile and include duplicates of system tools.
I am working to get Swift into Debian main. It is a long process, but progress is being made. I can try to represent the perspective of the Debian Policy that dictates what our packages must and must not do.
@Ron_Olson might be someone to include as he is the Fedora package maintainer.