* test/rubygems/test_gem_config_file.rb
  (TestGemConfigFile#test_check_credentials_permissions): skip on
  Windows. see [Bug #7784] [ruby-core:51864] and r39070.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39133 b2dd03c8-39d4-4d8f-98ff-823fe69b080e