* dir.cc (readdir_worker): Initialize dirent.d_type and __d_unused1.

* fhandler_disk_file.cc (fhandler_disk_file::readdir_helper):
	Set dirent.d_type based on FILE_ATTRIBUTE_*.
	* include/sys/dirent.h: Define _DIRENT_HAVE_D_TYPE (enables DT_*
	declarations).
	(struct dirent): Add d_type. Adjust __d_unused1 size to preserve layout.

winsup/cygwin/dir.cc

@@ -93,6 +93,9 @@ readdir_worker (DIR *dir, dirent *de)
     }
 
   de->d_ino = 0;
+  de->d_type = DT_UNKNOWN;
+  memset (&de->__d_unused1, 0, sizeof (de->__d_unused1));
+
   int res = ((fhandler_base *) dir->__fh)->readdir (dir, de);
 
   if (res == ENMFILE)