reporting-engine/report_substitute/views/assets_backend.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
        <template id="assets_backend" name="report assets" inherit_id="web.assets_backend">
            <xpath expr="." position="inside">
                <script type="text/javascript" src="/report_substitute/static/src/js/action_manager.js"></script>
            </xpath>
        </template>
</openerp>