[pkg-go] Fixed golang-x-text package for go 1.5

[Martin Packman]

On 22/10/2015, Michael Stapelberg <stapelberg at debian.org> wrote:
>
> Can you create an alioth account please? You can get a guest account
> without any trouble. Afterwards, please send a request to join pkg-go, and
> then you can do the update yourself :).

Done, account is gz-guest. James Page already pushed the branch (with
one more upstream revision, fixing the test failures so the debian
patch could be dropped), what the next step after that?

Martin