odoo_source/addons/audittrail/security/audittrail_security.xml

<?xml version="1.0"?>
<openerp>
	<data noupdate="0">
		<!-- Set access to menu -->
		<record id="menu_action_audittrail" model="ir.ui.menu">
			<field eval="[(6,0,[ref('base.group_system')])]" name="groups_id"/>
		</record>
	</data>
</openerp>