Check for SHA-512 instead of BLAKE in configure

Author: WillChilds-Klein

configure

@@ -7544,6 +7544,7 @@ WITH_SAVE_ENV([
     ], [
       OBJ_nid2sn(NID_md5);
       OBJ_nid2sn(NID_sha1);
+      OBJ_nid2sn(NID_sha512);
       OBJ_nid2sn(NID_sha3_512);
       EVP_PBE_scrypt(NULL, 0, NULL, 0, 2, 8, 1, 0, NULL, 0);
     ])], [ac_cv_working_openssl_hashlib=yes], [ac_cv_working_openssl_hashlib=no])