[HarfBuzz] HB config

[Eli Zaretskii]

> From: Behdad Esfahbod <behdad at behdad.org>
> Date: Tue, 18 Jun 2019 12:12:44 -0700
> Cc: "harfbuzz at lists.freedesktop.org" <harfbuzz at lists.freedesktop.org>
> 
> Hi Jonathan, Dominik, others,
> 
> You might have noticed I spent last couple of months trimming down HarfBuzz binary size.  I put some notes
> together in the repo:
> 
>   https://github.com/harfbuzz/harfbuzz/blob/master/CONFIG.md
> 
> I like to hear any feedback, as well as any other tricks that need to be documented.

Thank you very much, there's a lot of very useful information there.