MountingHole: fix 2 mm and 2.1 mm line endings
They were CRLF (Windows) and it was causing problems.
I submitted the symbols on https://github.com/KiCad/kicad-footprints/pull/922. I created them on Windows but submtted them from Linux and because of that, they were committed with CRLF endings (Windows). Now git is showing them as modified everytime I checkout a recent commit.
I'll be more careful next time :) Thanks!