Include fedora-release-kde in fedora-kde-common (#1720311)
As per https://bugzilla.redhat.com/show_bug.cgi?id=1720311 , no
KDE deliverables actually include fedora-release-kde, so they
are not identified as being the KDE variant at all. This change
would result in the KDE live image and ARM disk image including
fedora-release-kde.
Signed-off-by: Adam Williamson <awilliam@redhat.com>