.travis.yml: enhance build matrix
add OS=osx compiler=clang build matrix so that we can make sure things are built smoothly on that platform.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65122 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
.travis.yml: enhance build matrix
add OS=osx compiler=clang build matrix so that we can make sure
things are built smoothly on that platform.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65122 b2dd03c8-39d4-4d8f-98ff-823fe69b080e