xhtml_style: don't allow google translate

backport nexedi/erp5!879

/reviewed-on https://lab.nexedi.com/nexedi/erp5-capago/merge_requests/40

product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/template_erp5_xhtml_style.zpt

@@ -24,6 +24,7 @@ DEPRECATION:
           <meta name="generator" content="ERP5 - Copyright (C) 2001 - 2015. All rights reserved." />
           <meta name="robots" content="index, follow" />
           <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+          <meta name="google" value="notranslate">
           <tal:block metal:use-macro="global_definitions_macros/render_css_js" />
           <tal:block metal:define-slot="head"></tal:block>
         </head>