CryptoPkg/OpensslLib: Add "sort" keyword to header file parsing loop

CryptoPkg/OpensslLib: Add "sort" keyword to header file parsing loop

This prevents the .inf files from being randomized after every run
of process_files.pl.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Xiaoyu Lu <xiaoyux.lu@intel.com>
Signed-off-by: Christopher J Zurcher <christopher.j.zurcher@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>