single_login/views/single_login.xml

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

<template id="assets_backend" name="single_login assets" inherit_id="web.assets_backend">
	<xpath expr="." position="inside">
		<link rel="stylesheet" href="/single_login/static/src/css/custom.css"/>
		<script type="text/javascript" src="/single_login/static/src/js/custom.js"></script>
	</xpath>
</template>

</data>
</openerp>