bug#30193: crash in libotf

[Eli Zaretskii]

> From: handa <handa@gnu.org>
> Cc: eliz@gnu.org,  30193@debbugs.gnu.org
> Date: Thu, 25 Jan 2018 18:23:45 +0900
> 
> 1. Check the version number of libotf in configure script.
> 2. Expose that version number to config.h.
> 3. In xfaces.c, if the version number is less than 0.9.16, initialize
>    Vface_ignored_fonts to ("Noto Serif Kannada").

Why not just add that font to face-ignored-fonts by default?

Thanks.