git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@29563 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r29298 from trunk into ruby_1_9_2.¶
RUBY_INSTALL_NAME with RUBY_SO_NAME. a patch from Jeremy Evans
at [ruby-core:32474].
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@29563 b2dd03c8-39d4-4d8f-98ff-823fe69b080e