Allow travis/test.sh to be run locally (not on travis)
Allow travis/test.sh to be run locally (not on travis)

This helps people check that all the tests will pass before they send a PR.

flutter/flutter,tvolkert/flutter,turnidge/flutter,cbracken/flutter,tvolkert/flutter,Hixie/flutter,flutter/flutter,Hixie/flutter,turnidge/flutter,flutter/flutter,tvolkert/flutter,cbracken/flutter,flutter/flutter,turnidge/flutter,Hixie/flutter,aghassemi/flutter,cbracken/flutter,tvolkert/flutter,turnidge/flutter,cbracken/flutter,Hixie/flutter,Hixie/flutter,tvolkert/flutter,Hixie/flutter,Hixie/flutter,tvolkert/flutter,cbracken/flutter,cbracken/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,aghassemi/flutter,tvolkert/flutter,flutter/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,aghassemi/flutter,flutter/flutter,cbracken/flutter,tvolkert/flutter,cbracken/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,cbracken/flutter,flutter/flutter,aghassemi/flutter,turnidge/flutter