Merge pull request rbenv#74 from hsbt/fix-require_gcc

s/use_gcc42_on_lion/require_gcc/

Author: jeremy

share/ruby-build/2.0.0-dev

@@ -1,3 +1,3 @@
-use_gcc42_on_lion
+require_gcc
 install_package "yaml-0.1.4" "http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz"
 install_git "ruby-2.0.0-dev" "https://github.com/ruby/ruby.git" "trunk" autoconf standard