Don't run this test unless 'openssl rehash' works properly. Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/2664)
Fortunately, "openssl verify" makes good use of that API Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/2652)