use gcc on lion for 1.9.2

Author: Julien Ammous

share/ruby-build/1.9.2-p290

@@ -1,3 +1,4 @@
+use_gcc42_on_lion
 install_package "yaml-0.1.4" "http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz"
 install_package "ruby-1.9.2-p290" "http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.2-p290.tar.gz"
 install_package "rubygems-1.8.10" "http://production.cf.rubygems.org/rubygems/rubygems-1.8.10.tgz" ruby