rpm packaging: depend on pristine-tar

In practice, it is a weak dependency but upstream RPM doesn't support
weak dependencies so we put it to 'Requires:' for everything else than
openSUSE or Tizen (which do support weak deps).

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
rpm: give patches in the order they are applied in the spec

Fixes patch importing in situations when patch tag numbering in the spec
differs from the order they are applied.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>