definition for 1.9.3p546 hosted by heroku

Since Ruby 1.9.3 is now in [security fix
only
mode](https://www.ruby-lang.org/en/news/2014/01/10/ruby-1-9-3-will-end-on-2015/),
I've built a source that applies [BUG #9592](https://bugs.ruby-lang.org/issues/9592)
which is the latest commit on the ruby_1_9_3 svn branch. This is NOT a
fork.