bpo-33635: Handling Bad file descriptor in Path.is_file and related. (GH-8542)

diff --git a/Misc/NEWS.d/next/macOS/2018-07-31-09-51-01.bpo-33635.KiscE-.rst b/Misc/NEWS.d/next/macOS/2018-07-31-09-51-01.bpo-33635.KiscE-.rst
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+In macOS stat on some file descriptors (/dev/fd/3 f.e) will result in bad
+file descriptor OSError. Guard against this exception was added in is_dir,
+is_file and similar methods. DirEntry.is_dir can also throw this exception
+so _RecursiveWildcardSelector._iterate_directories was also extended with
+the same error ignoring pattern.