[FIX] packaging: include *.xsd and *.wsdl files when necessary

MANIFEST.in

@@ -31,6 +31,8 @@ recursive-include openerp *.txt
 recursive-include openerp *.ttf
 recursive-include openerp *.woff
 recursive-include openerp *.woff2
+recursive-include openerp *.wsdl
+recursive-include openerp *.xsd
 recursive-include openerp *.xsl
 recursive-include openerp *.xml
 recursive-include openerp *.yml