https://bugzilla.redhat.com/show_bug.cgi?id=870615
--- Comment #9 from Volker Fröhlich volker27@gmx.at --- You got me wrong there:
When I said "submit" I meant to submit it upstream, as suggested in the part of the guidelines I cited.
The tarball has a "bin" subdirectory including a Windows dll. Delete that in the prep section.