bug#48804: 27.2; compilation emacs on macOS

[Eli Zaretskii]

> From: Niels Søndergaard <nisoni@algon.dk>
> Date: Fri, 4 Jun 2021 14:19:54 +0200
> Cc: Eli Zaretskii <eliz@gnu.org>,
>  Alan Third <alan@idiocy.org>,
>  Niels Søndergaard <nisoni@algon.dk>,
>  48804@debbugs.gnu.org
> 
> I’ve gcc 10.2.0_4 installed by Homebrew on my new iMac 24” (with M1), and 
> can’t get a newer version, so I’ll
> properly have to wait ….. 

What's wrong with GCC 10?  AFAIK, even GCC 7 comes with libgccjit that
is good enough for Emacs.