This is the same issue as bug #1093204. gupnp-av should come with gupnp-av-1.0.deps and gupnp-av-1.0.vapi. gupnp-dlna should come with gupnp-dlna-2.0.deps and vapi, plus gupnp-dlna-gst-2.0.deps and vapi. All of these files go in /usr/share/vala/vapi These files are needed to build Rygel for example.
gupnp-av-0.12.6-5.fc21,gupnp-dlna-0.10.2-6.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/gupnp-av-0.12.6-5.fc21,gupnp-dlna-0.10.2-6.fc21
Package gupnp-av-0.12.6-5.fc21, gupnp-dlna-0.10.2-6.fc21: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing gupnp-av-0.12.6-5.fc21 gupnp-dlna-0.10.2-6.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-10673/gupnp-av-0.12.6-5.fc21,gupnp-dlna-0.10.2-6.fc21 then log in and leave karma (feedback).
I would test this, but I'm on Fedora 20.. :\
gupnp-av-0.12.6-5.fc21, gupnp-dlna-0.10.2-6.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.