[cairo] Toy font face naming

[Behdad Esfahbod]

Chris Wilson wrote:
> I'm still hesitant about the semantics behind the toy font face name.
> Would cairo_system_font_face_t be a more apt description? And then
> introduce a new type and ensure CAIRO_FONT_TYPE_TOY is never returned,
> only to be kept as an amusing anecdote.

There's nothing "system" about it.  It's exactly *not* "system".  Donno.  To
me toy really is what it is.

behdad