Add blake2 support.

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
diff --git a/util/mkdef.pl b/util/mkdef.pl
index a847b0b..4578c9a 100755
--- a/util/mkdef.pl
+++ b/util/mkdef.pl
@@ -75,7 +75,7 @@
 			 "SHA256", "SHA512", "RMD160",
 			 "MDC2", "WHIRLPOOL", "RSA", "DSA", "DH", "EC", "EC2M",
 			 "HMAC", "AES", "CAMELLIA", "SEED", "GOST",
-                         "SCRYPT", "CHACHA", "POLY1305",
+                         "SCRYPT", "CHACHA", "POLY1305", "BLAKE2",
 			 # EC_NISTP_64_GCC_128
 			 "EC_NISTP_64_GCC_128",
 			 # Envelope "algorithms"