Fix build for macOS 11 SDK am: 6a4b58d73d am: 8c5e412865 am: a6ecdfa003 am: 369499f7b9

Original change: https://android-review.googlesource.com/c/platform/external/python/cpython2/+/1362702

Change-Id: Ic452ba0d7ced553f29be56b4aa146c409a675c20