bug#39799: 28.0.50; Most emoji sequences don’t render correctly

[Eli Zaretskii]

> Date: Tue, 21 Sep 2021 13:54:02 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: rgm@gnu.org, 39799@debbugs.gnu.org, mfabian@redhat.com
> 
> > I think this means you'd have to add the Variation Selectors to the
> > emoji script
> 
> Yes, of course.

Btw, we could recognize VS-16 explicitly in font_range, and avoid
putting them into the 'emoji' script.  But that would be too kludgey,
I guess.