Include /usr/X11R6/include on openbsd

[dxtr]

Otherwise the spec file won't be properly generated

I also had to reame SDL_ttf.h to SDL2_ttf.h for things to actually start working. This can probably be reverted if I made a mistake

[Failproofshark]

Thanks dxtr. Im going to pull and test this when I get the chance.

[Failproofshark]

Hey dxtr, sorry for taking long to get back to you.

I tried this out change out, unfortunately it breaks the Linux build in that it cannot locate the header file to map function calls.

You could try looking into features to provide some conditionalization into setting the path for the header file