.travis.yml: suppress travis specific failure
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49814 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
.travis.yml: suppress travis specific failure
only in travis OSX for the time being.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49814 b2dd03c8-39d4-4d8f-98ff-823fe69b080e