Updated Rakefile to save a backup copy of our Cartfile before running Carthage tests
Updated Rakefile to save a backup copy of our Cartfile before running Carthage tests

braintree/braintree_ios,billCTG/braintree_ios,braintree/braintree_ios,braintree/braintree_ios,braintree/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios