Fontconfig tests seem to pass now.

- Update to version 2.8
* Support for OpenType Variation Fonts is now complete. The last
missing part was handling the `VVAR' and `MVAR' tables, which is
available with this release.
* A new function `FT_Face_Properties' allows the control of some
module and library properties per font. Currently, the
following properties can be handled: stem darkening, LCD filter
weights, and the random seed for the `random' CFF operator.

* The PCF change to show more `colourful' family names (introduced
in version 2.7.1) was too radical; it can now be configured with
PCF_CONFIG_OPTION_LONG_FAMILY_NAMES at compile time. If
activated, it can be switched off at run time with the new pcf
property `no-long-family-names'. If the `FREETYPE_PROPERTIES'
environment variable is available, you can say
FREETYPE_PROPERTIES=pcf:no-long-family-names=1
* Support for the following scripts has been added to the
auto-hinter.
Adlam, Avestan, Bamum, Buhid, Carian, Chakma, Coptic, Cypriot,
Deseret, Glagolitic, Gothic, Kayah, Lisu, N'Ko, Ol Chiki, Old
Turkic, Osage, Osmanya, Saurashtra, Shavian, Sundanese, Tai
Viet, Tifinagh, Unified Canadian Syllabics, Vai

* `Light' auto-hinting mode no longer uses TrueType metrics for
TrueType fonts. This bug was introduced in version 2.4.6,
causing horizontal scaling also. Almost all GNU/Linux
distributions (with Fedora as a notable exception) disabled the
corresponding patch for good reasons; chances are thus high that
you won't notice a difference.
* If a TrueType font gets loaded with FT_LOAD_NO_HINTING, FreeType