text: add new code pages: IBM 1047 and 1140. These codepages are used for interbank credit card authorization and clearing. Change-Id: I65e9b0ca315cee4e87d002276ffe62d14192c9bf Reviewed-on: https://go-review.googlesource.com/35172 Reviewed-by: Marcel van Lohuizen <mpvl@golang.org> Run-TryBot: Marcel van Lohuizen <mpvl@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>