eo: use the "EXTRA_DIST" macro to install .py files

eo: use the "EXTRA_DIST" macro to install .py files

Summary:
The SCRIPTS macro will add the executable flag (+x) to the Python scripts ; but as
these do not have a shebang (#!/bin/python) and we are executing them explicitly with
"python ...", it is useless. Plus, some build environments will issue a warning about
this.

Reviewers: tasn, JackDanielZ

Subscribers: mbachmann

Projects: #efl

Differential Revision: https://phab.enlightenment.org/D1469

Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>