Test how link() actually works on WASI.

Author: serhiy-storchaka

Lib/test/test_posix.py

@@ -1540,6 +1540,9 @@ def test_link_follow_symlinks(self):
                 self.assertEqual(posix.lstat(link), posix.lstat(orig))
             elif default_no_follow:
                 self.assertEqual(posix.lstat(link), posix.lstat(symlink))
+            if sys.platform.startswith('wasi'):
+                self.assertEqual(posix.lstat(link), posix.lstat(orig))
+                self.assertEqual(posix.lstat(link), posix.lstat(symlink))
 
         with self.subTest('follow_symlinks=False'):
             # follow_symlinks=False -> duplicate the symlink itself