deps: update OpenSSL upgrade process

Particularly, ensure that the commit messages are self-explanatory so
that reviewers can understand that the large commits are the result of a
simple repeatable process. This should make them easier to review.

See: https://github.com/nodejs/node/pull/26327#issuecomment-468745161

PR-URL: https://github.com/nodejs/node/pull/26378


Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>