Uses only the test vectors that use the same MGF and label hashes. Change-Id: I971f78556e7b8fdbc785978dca7a613728676697 Reviewed-on: https://go-review.googlesource.com/c/crypto/+/234917 Trust: Roland Shoemaker <roland@golang.org> Trust: Katie Hockman <katie@golang.org> Run-TryBot: Roland Shoemaker <roland@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Katie Hockman <katie@golang.org>