Merge pull request rbenv#136 from koraktor/master

Added definition for Ruby 1.9.2-p318

Author: sstephenson

share/ruby-build/1.9.2-p318

@@ -0,0 +1,4 @@
+require_gcc
+install_package "yaml-0.1.4" "http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz"
+install_package "ruby-1.9.2-p318" "http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.2-p318.tar.gz"
+install_package "rubygems-1.8.10" "http://production.cf.rubygems.org/rubygems/rubygems-1.8.10.tgz" ruby