util-docker: Add Python test dependencies to Docker

These are needed to run our Python tests

Change-Id: Ifd6904a59ad3b6217a337bd5e912c3e7e2e10c17
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/47219
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed