- Re-enable freetype-config, there is just too many fallouts.

- Update to version 2.9.1
* Type 1 fonts containing flex features were not rendered
correctly (bug introduced in version 2.9).
* CVE-2018-6942: Older FreeType versions can crash with certain
malformed variation fonts.
* Bug fix: Multiple calls to `FT_Get_MM_Var' returned garbage.
* Emboldening of bitmaps didn't work correctly sometimes, showing
various artifacts (bug introduced in version 2.8.1).
* The auto-hinter script ranges have been updated for Unicode 11.
No support for new scripts have been added, however, with the
exception of Georgian Mtavruli.
- freetype-config is now deprecated by upstream and not enabled
by default.
- Drop upstreamed patches:
* bnc1079600.patch
* psaux-flex.patch
* 0001-src-truetype-ttinterp.c-Ins_GETVARIATION-Avoid-NULL-.patch
* 0001-truetype-Better-protection-against-invalid-VF-data.patch

- Update to version 2.9.1
* No changelog upstream.