Disable -Wno-single-bit-bitfield-constant-conversion locally am: e190c6100b am: 59e93988ec

Original change: https://android-review.googlesource.com/c/platform/external/python/cpython2/+/3237111

Change-Id: I1c97a1f966bfc226094cb0b85cc30d6aca473d52
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>