CryptoPkg/OpensslLib: Fix CRLF breakage in process_files.sh

This got broken in committing, due to a catalogue of broken practices.

Firstly, we should *pull* git submissions, never recommit them. You
preserve the correct history then, and don't risk rebasing to result in
a history which *never* worked in the form that gets preserved.

That would have kept the authorship attrbution correct too.

Secondly, we shouldn't be storing CRLF line endings in the objects that
git stores in its database. It is designed to store simple LF line endings,
and then check that out as appropriate for the system (resulting in CRLF
in the working tree for Windows users, as they expect). That would avoid
this problem, and all the other problems we have with patches being
exchanged.

Make it executable too, which also got lost in the commit mess.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>