travis: run on OSX too
travis: run on OSX too

Akemi/libass,libass/libass,sanyaade-g2g-repos/libass,Akemi/libass,grigorig/libass,astiob/libass,mwgoldsmith/libass,mwgoldsmith/libass,torque/libass,torque/libass,sanyaade-g2g-repos/libass,torque/libass,sanyaade-g2g-repos/libass,stps/libass,stps/libass,stps/libass,Akemi/libass,ShiftMediaProject/libass,astiob/libass,MrSmile/libass,xbmc/libass,grigorig/libass,xbmc/libass,MrSmile/libass,mwgoldsmith/libass,ShiftMediaProject/libass,libass/libass