cmd/release: use armv6l as arm binary arch name

See also golang/go#13669 for rationales.

Change-Id: I5847ec1d3558b24716b8e753b8517105ad66fd3c
Reviewed-on: https://go-review.googlesource.com/18059
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
1 file changed