merge revision(s) 39560,39562,39572: [Backport #7991]
* lib/rubygems/ext/ext_conf_builder.rb (Gem::Ext::ExtConfBuilder.hack_for_obsolete_sytle_gems): remove circular dependencies for old style gems which locate extconf.rb on the toplevel. [ruby-core:53059] [ruby-trunk - Bug #7698] (Gem::Ext::ExtConfBuilder.hack_for_obsolete_style_gems): remove * lib/rubygems/ext/ext_conf_builder.rb (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/branches/ruby_2_0_0@39790 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 39560,39562,39572: [Backport #7991]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@39790 b2dd03c8-39d4-4d8f-98ff-823fe69b080e