tool/ruby_vm support for pre-2.1 BASERUBY
as requested by devs, support for BASERUBY prior to 2.1
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61786 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
tool/ruby_vm support for pre-2.1 BASERUBY
as requested by devs, support for BASERUBY prior to 2.1
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61786 b2dd03c8-39d4-4d8f-98ff-823fe69b080e