hooks: Fix openstacknet hook

The hook should be built with default VDSM build since we want to supply
it to users.

Additionally, the consts file should be packaged with it's "binaries" in
the RPM.

Change-Id: I6e9f1c6a6ffbc4fc0008fe2d897dac0d44a8c300
Signed-off-by: Mike Kolesnik <mkolesni@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/16556
Reviewed-by: Dan Kenigsberg <danken@redhat.com>