Function symlink_test

Lib/test/test_tarfile.py:3668–3669

(f)

# Like other symlink tests, skip these on WASI for now.
if support.is_wasi:
    def symlink_test(f):
        return unittest.skip("WASI: Skip symlink test for now")(f)
else:
    def symlink_test(f):
        return f