auditlog/data/ir_cron.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data noupdate="1">

        <record id="ir_cron_auditlog_autovacuum" model="ir.cron">
            <field name='name'>Auto-vacuum audit logs</field>
            <field name='interval_number'>1</field>
            <field name='interval_type'>days</field>
            <field name="numbercall">-1</field>
            <field name="active" eval="False"/>
            <field name="doall" eval="False"/>
            <field name="model">auditlog.autovacuum</field>
            <field name="function">autovacuum</field>
            <field name="args">(180,)</field>
        </record>

    </data>
</openerp>