[openssl/openssl] 7c7298: Add hurd-x86_64 support

[Samuel Thibault]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 7c729851d169f30d9e0c0ad6e7c1cf6cefb37935
      https://github.com/openssl/openssl/commit/7c729851d169f30d9e0c0ad6e7c1cf6cefb37935
  Author: Samuel Thibault <samuel.thibault at ens-lyon.org>
  Date:   2023-08-04 (Fri, 04 Aug 2023)

  Changed paths:
    M Configurations/10-main.conf
    M util/perl/OpenSSL/config.pm

  Log Message:
  -----------
  Add hurd-x86_64 support

This also upgrades flags similarly to the Linux configuration.

Reviewed-by: Richard Levitte <levitte at openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre at ncp-e.com>
Reviewed-by: Todd Short <todd.short at me.com>
(Merged from https://github.com/openssl/openssl/pull/20896)