util/mkdef.pl: omit ordinals from Windows DLLs.
util/mkdef.pl: omit ordinals from Windows DLLs.

Reviewed-by: Stephen Henson <9ce5770b3bb4b2a1d59be2d97e34379cd192299f@openssl.org>

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl