blake2s: register BLAKE2s

Register BLAKE2s-256 if the package is imported.
Change-Id: Ib415ae641f21d863720bf9c089017ee97654a555
Reviewed-on: https://go-review.googlesource.com/36878
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Reviewed-by: Adam Langley <agl@golang.org>
Run-TryBot: Matt Layher <mdlayher@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
1 file changed