Travis CI: rename old `matrix` key to current `jobs`
Travis CI: rename old `matrix` key to current `jobs`

MrSmile/libass,xbmc/libass,astiob/libass,astiob/libass,libass/libass,ShiftMediaProject/libass,xbmc/libass,MrSmile/libass,libass/libass,Akemi/libass,Akemi/libass,ShiftMediaProject/libass,Akemi/libass