cmd/cl: accept R=go1.6 to close but auto-open when we start 1.6

Change-Id: If3cdb725ced3f726d48a2fd82ec8b12a84e9f889
Reviewed-on: https://go-review.googlesource.com/11671
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
1 file changed