Fix VMS use of util/mkdef.pl in top build.info

Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4921)

build.info

@@ -54,9 +54,9 @@ IF[{- $config{target} =~ /^VC-/ -}]
   SHARED_SOURCE[libcrypto]=libcrypto.def
   SHARED_SOURCE[libssl]=libssl.def
 ELSIF[{- $config{target} =~ /^vms/ -}]
-  GENERATE[libcrypto.opt]=util/mkdef.pl crypto 32
+  GENERATE[libcrypto.opt]=util/mkdef.pl crypto VMS
   DEPEND[libcrypto.opt]=util/libcrypto.num
-  GENERATE[libssl.opt]=util/mkdef.pl ssl 32
+  GENERATE[libssl.opt]=util/mkdef.pl ssl VMS
   DEPEND[libssl.opt]=util/libssl.num
 
   SHARED_SOURCE[libcrypto]=libcrypto.opt