Revert r44778 #9375

It breaks test-all if all tests are in a single process


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44786 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/commands/contents_command.rb

@@ -94,11 +94,11 @@ prefix or only the files that are requireable.
     spec.files.sort.map do |file|
       case file
       when /\A#{spec.bindir}\//
-        [RbConfig::CONFIG['bindir'], $POSTMATCH]
+        [Gem::ConfigMap[:bindir], $POSTMATCH]
       when /\.so\z/
-        [RbConfig::CONFIG['archdir'], file]
+        [Gem::ConfigMap[:archdir], file]
       else
-        [RbConfig::CONFIG['rubylibdir'], file]
+        [Gem::ConfigMap[:rubylibdir], file]
       end
     end
   end