add workflow for python 3 type

Related to rhbz#1047085

Signed-off-by: Richard Marko <rmarko@redhat.com>
spec: install workflows for python 3 type

Related to rhbz#1047085

Signed-off-by: Richard Marko <rmarko@redhat.com>
Merge pull request #240 from abrt/py3

add workflow for python 3 type