fix old links

share/ruby-build/1.9.3-p484

 install_package "yaml-0.1.4" "http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz#36c852831d02cf90508c29852361d01b" --if needs_yaml
-install_package "ruby-1.9.3-p448" "http://cache.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p448.tar.gz#8ac0dee72fe12d75c8b2d0ef5d0c2968"
+install_package "ruby-1.9.3-p484" "http://cache.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p484.tar.gz#8ac0dee72fe12d75c8b2d0ef5d0c2968"

share/ruby-build/2.0.0-p353

 install_package "openssl-1.0.1e" "https://www.openssl.org/source/openssl-1.0.1e.tar.gz#66bf6f10f060d561929de96f9dfe5b8c" mac_openssl --if has_broken_mac_openssl
-install_package "ruby-2.0.0-p247" "http://cache.ruby-lang.org/pub/ruby/2.0/ruby-2.0.0-p247.tar.gz#78282433fb697dd3613613ff55d734c1" standard verify_openssl
+install_package "ruby-2.0.0-p353" "http://cache.ruby-lang.org/pub/ruby/2.0/ruby-2.0.0-p353.tar.gz#78282433fb697dd3613613ff55d734c1" standard verify_openssl