packaging: Build pyc/pyo files

Add to built packages .pyc and .pyo files.

This was done so far by rpmbuild if the package redhat-rpm-config was
installed. Do this now directly by make.

Change-Id: Ia4098fb7f8f664e6c1df678717c8ee230a3113fe
Signed-off-by: Yedidyah Bar David <didi@redhat.com>