* libass dynamic library
it relies on fribidi, harfbuzz, fontconfig, libiconv
* Remove references to iconv and fontconfig
Because this port is currently Windows-only (Fribidi doesn't build on
Linux with vcpkg because of an issue with Meson), we don't want to worry
about FontConfig; DirectWrite should be enough.
* Freetype is important!
* Remove unnecessary fontconfig -- for real
* Remove unnecessary comment
