sstephenson/ruby-build — pull request #477 by hsbt (2013-12-23 00:46:53+00:00)
Title: Added definitions of Heroku's backports.

I picked up to heroku's backports on official Ruby repository.

See http://www.ruby-lang.org/en/news/2013/12/17/maintenance-of-1-8-7-and-1-9-2/

/cc @hone