Added ree-1.8.7-2010.01

I've still got projects stuck on this patch level. I'm probably not
alone...

share/ruby-build/ree-1.8.7-2010.01

+require_gcc
+install_package "ruby-enterprise-1.8.7-2010.01" "http://files.rubyforge.vm.bytemark.co.uk/emm-ruby/ruby-enterprise-1.8.7-2010.01.tar.gz" ree_installer
+install_package "rubygems-1.6.2" "http://production.cf.rubygems.org/rubygems/rubygems-1.6.2.tgz" ruby