added packages to python requirements file

BUG=chromium:322308
TEST=run_all_test.py

Change-Id: I5a7c829b7266085da2c6760de51e771a599bebda
Reviewed-on: https://chromium-review.googlesource.com/177712
Reviewed-by: Byron Kubert <byronk@chromium.org>
Commit-Queue: Byron Kubert <byronk@chromium.org>
Tested-by: Byron Kubert <byronk@chromium.org>
1 file changed