Make travis brew update more reliable
Make travis brew update more reliable

Brew update is done automatically on the first install, and timeout too many times due to the big changes between the osx image and today. travis_wait should prevent the "no output generated in the last 10 minutes"

matham/kivy,akshayaurora/kivy,rnixx/kivy,inclement/kivy,matham/kivy,akshayaurora/kivy,inclement/kivy,inclement/kivy,matham/kivy,akshayaurora/kivy,kivy/kivy,kivy/kivy,rnixx/kivy,rnixx/kivy,matham/kivy,kivy/kivy