fix typo in travis script
fix typo in travis script

patmarion/director,openhumanoids/director,patmarion/director,mitdrc/director,manuelli/director,mitdrc/director,mitdrc/director,manuelli/director,openhumanoids/director,patmarion/director,mitdrc/director,openhumanoids/director,patmarion/director,mitdrc/director,manuelli/director,manuelli/director,openhumanoids/director,openhumanoids/director,patmarion/director,manuelli/director