spec: require SDK 3
spec: require SDK 3

SDK 4 has been renamed and is completely
incompatible with SDK 3.

Change-Id: Ia6dc91a29b4e0095cd2ab7052ed6aefec7486654
Signed-off-by: Sandro Bonazzola <fcb014d63786651910af5db2ecc5316c668188ef@redhat.com>

oVirt/ovirt-iso-uploader,oVirt/ovirt-iso-uploader