fix rvm_requiremnts_fail_or_run_action, update #1720, update #1724, found: http://stackoverflow.com/questions/15587298/cant-install-ruby-1-9-3-via-rvm-in-os-x-lion-even-with-with-gcc-clang/15587558?noredirect=1#comment22320984_15587558
NEXT: 1.19.1 with 1720 / 1724