odoo/addons/base_tools/tools_view.xml

<?xml version="1.0"?>
<openerp>
    <data>

          <menuitem icon="STOCK_PREFERENCES" id="base.menu_tools"
                    name="Tools" sequence="160"
                    web_icon="images/tools.png"
                    web_icon_hover="images/tools-hover.png"/>

    </data>
</openerp>