Make dir1 writeable before rename

Author: StanFromIreland

Lib/test/test_tempfile.py

@@ -1890,6 +1890,7 @@ def hook(path, *, dir_fd=None):
                     return unlink(path, dir_fd=dir_fd)
                 except PermissionError:
                     if not os.path.islink(dir1):
+                        os.chmod(dir1, 0o700)
                         os.rename(dir1, dir1 + '_moved')
                         os.symlink(target, dir1)
                     raise