IETF I-D Build update changes

[martinthomson]

Consider updating the Makefile and workflow files. There are some improvements you might benefit from.

Also, you should list /lib/ in .gitignore. I don't know how that change didn't end up being made, but the directory/link is constant pollution in any git status checks.

[nikiluk]

Thank you! Your fix that enables working with different line endings worked, will proceed with updates to the build.