eiru_reports_purchases/views/menus.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>

        <menuitem
            name="Compras"
            id="purchase_parent_menu"
            parent="eiru_reports_sales.eiru_reports_main_menu"
            sequence="3"/>

        <!--
        ===========================
           HISTORICO DE COMPRAS
        ===========================
        -->
        <menuitem
            name="Historico de Compras"
            id="purchase_history_menu"
            parent="purchase_parent_menu"
            action="purchase_action"
            sequence="1"/>

        <!--
        ===========================
           ANALISIS DE COMPRAS
        ===========================
        -->
        <menuitem
            name="Análisis de Compras"
            id="purchase_analytic_menu"
            parent="purchase_parent_menu"
            action="purchase_analytic_action"
            sequence="2"/>

    </data>
</openerp>