bug#33748: 27.0.50; harfbuzz branch fails to compile

[Eli Zaretskii]

> From: Colin Baxter <m43cap@yandex.com>
> Cc: dr.khaled.hosny@gmail.com, far.nasiri.m@gmail.com,  behdad@behdad.org,  
> 33748@debbugs.gnu.org
> Cc: 
> Date: Sat, 15 Dec 2018 11:24:10 +0000
> 
> To add to the success-chorus, moving to another machine, debian 9.6 with
> harfbuzz 1.4.2, I can make emacs-27.0.50 with HARFBUZZ as a configured
> feature. 

Thanks.