ruby trunk test failure at Sep 15

  1) Failure:
TestDir#test_symlink [/home/kosaki/src/ruby/test/ruby/test_dir.rb:234]:
<["/tmp/__test_dir__20150915-60718-diqxrp/",
 "/tmp/__test_dir__20150915-60718-diqxrp/a/",
 "/tmp/__test_dir__20150915-60718-diqxrp/c/",
 "/tmp/__test_dir__20150915-60718-diqxrp/e/",
 "/tmp/__test_dir__20150915-60718-diqxrp/g/",
 "/tmp/__test_dir__20150915-60718-diqxrp/i/",
 "/tmp/__test_dir__20150915-60718-diqxrp/k/",
 "/tmp/__test_dir__20150915-60718-diqxrp/m/",
 "/tmp/__test_dir__20150915-60718-diqxrp/o/",
 "/tmp/__test_dir__20150915-60718-diqxrp/q/",
 "/tmp/__test_dir__20150915-60718-diqxrp/s/",
 "/tmp/__test_dir__20150915-60718-diqxrp/u/",
 "/tmp/__test_dir__20150915-60718-diqxrp/w/",
 "/tmp/__test_dir__20150915-60718-diqxrp/y/"]> expected but was
<["/tmp/__test_dir__20150915-60718-diqxrp/"]>.

  2) Failure:
TestDir#test_symlinks_not_resolved [/home/kosaki/src/ruby/test/ruby/test_dir.rb:314]:
<["dir-symlink", "some-dir", "some-dir/foo"]> expected but was
<["dir-symlink", "dir-symlink/foo", "some-dir", "some-dir/foo"]>.