ext_conf_builder.rb: remove circular dependency in install-so
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39572 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
ext_conf_builder.rb: remove circular dependency in install-so
(Gem::Ext::ExtConfBuilder.hack_for_obsolete_style_gems): remove
circular dependencies in install-so too. [ruby-core:52882]
[Bug #7698]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39572 b2dd03c8-39d4-4d8f-98ff-823fe69b080e