Pin RVM version to latest stable at last precise update
Pin RVM version to latest stable at last precise update

ljharb/travis-cookbooks,spurti-chopra/travis-cookbooks,ljharb/travis-cookbooks,ljharb/travis-cookbooks,travis-ci/travis-cookbooks,travis-ci/travis-cookbooks,spurti-chopra/travis-cookbooks,dracos/travis-cookbooks,spurti-chopra/travis-cookbooks,dracos/travis-cookbooks,dracos/travis-cookbooks,travis-ci/travis-cookbooks,dracos/travis-cookbooks