shiny: make "go generate" command work on any OS

See issue golang/go#16368 for details.

Updates golang/go#16368

Change-Id: I6fe194b34ff9bb24d78e93a1bca76245385759f4
Reviewed-on: https://go-review.googlesource.com/24951
Reviewed-by: Nigel Tao <nigeltao@golang.org>
4 files changed