Disable getentropy on Mac to support 10.10 am: d948d44e88

Original change: https://android-review.googlesource.com/c/platform/external/python/cpython3/+/1590982

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5dc6dca2f0c9d07c2d4144896bb5e6537b9a4cff