language: carry over all extensions

Not just the ā€˜uā€™ extension.

Change-Id: Ia8fac679ecec066d1cd7af3f6b91d78010b3146a
Reviewed-on: https://go-review.googlesource.com/55991
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2 files changed