edb appdata

[ryanlerch]

Upstream edb has an appdata file in their trunk, but we are just waiting for the next release to be included in Fedora.

So we are keeping that appdata file here in the fedora appstream until that happens.
https://github.com/hughsie/fedora-appstream/blob/master/appdata-extra/desktop/edb.appdata.xml

The appdata file in upstream is here:
https://code.google.com/p/edb-debugger/source/browse/trunk/edb.appdata.xml

And the upstream bug is here:
https://code.google.com/p/edb-debugger/issues/detail?id=130