travis: add workaround for failing osx build
travis: add workaround for failing osx build

Cheaterman/kivy,KeyWeeUsr/kivy,KeyWeeUsr/kivy,matham/kivy,tony/kivy,akshayaurora/kivy,Cheaterman/kivy,jegger/kivy,manthansharma/kivy,LogicalDash/kivy,rnixx/kivy,matham/kivy,KeyWeeUsr/kivy,manthansharma/kivy,rnixx/kivy,LogicalDash/kivy,kived/kivy,janssen/kivy,kivy/kivy,inclement/kivy,LogicalDash/kivy,jegger/kivy,jkankiewicz/kivy,kived/kivy,matham/kivy,matham/kivy,bionoid/kivy,akshayaurora/kivy,inclement/kivy,kived/kivy,jkankiewicz/kivy,rnixx/kivy,Cheaterman/kivy,jegger/kivy,janssen/kivy,manthansharma/kivy,rafalo1333/kivy,kivy/kivy,autosportlabs/kivy,janssen/kivy,rafalo1333/kivy,autosportlabs/kivy,autosportlabs/kivy,jkankiewicz/kivy,inclement/kivy,kivy/kivy,manthansharma/kivy,jegger/kivy,akshayaurora/kivy,bionoid/kivy,LogicalDash/kivy,tony/kivy,KeyWeeUsr/kivy,tony/kivy,jkankiewicz/kivy,Cheaterman/kivy,rafalo1333/kivy,bionoid/kivy,janssen/kivy,bionoid/kivy