build: add missing root folder files into tarball

tarball should contain all source control files plus
generated files.

Change-Id: I18c9700d66a136c88f3c7e1389716981c9136037
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/29756
Reviewed-by: Dan Kenigsberg <danken@redhat.com>