Increase the number of test vectors in this package to provide better validation of new SIMD implementations. Change-Id: Ia89883609e78cef53ba40a9cae41f4e0a3bccc80 Reviewed-on: https://go-review.googlesource.com/112855 Run-TryBot: Michael Munday <mike.munday@ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>