bug#47378: Emacs 27.1 binary Mac OS build crashes on Big Sur (11.x)

[Carlos Pita]

Just in case, I know this is about 27.1 but I've been using:

- emacs 27.2 from brew
- emacs-plus 27.2 and 28 (emacs-28 branch) from brew
- emacs-mac (railwaycat port, I believe it was 27.2 also) from brew
- emacs 27.2 from https://emacsformacosx.com
- custom builds with vanilla options of emacs-28 and master branches

All in Big Sur (Intel, not M1, it's a MacBook Pro 2017) and have seen no
crash until now.

Maybe this can be closed (?)