[test/i18n] Update reference po file following 75cd7df5c32e
This changeset added a (missing) message "add a <etype>", so reference po file
needed an update.
include *.pyinclude */*.pyrecursive-include data *.gif *.png *.ico *.css *.jsrecursive-include i18n *.porecursive-include wdoc *