[SDL] Put links to official SDL_* libraries on main page

[Sebastian Beschke]

Роман Кирилич schrieb:
> Oh, they are here (at http://www.libsdl.org/projects/SDL_ttf/release/)
> but on web page (http://www.libsdl.org/SDL_ttf/) there are links to
> version 2.0.7.
> Please update this webpage!
> 

When I open that page, I get links to the 2.0.8 packages. Ever tried
pressing F5 in your browser?

-Sebastian