[kokoro python] Keep logs when things went wrong am: 181170c1d1 am: c17c26ef3b

Original change: https://android-review.googlesource.com/c/platform/external/python/cpython3/+/1573338

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I90773b9808d93848d4a9c8e4467af1637a9fbf40