[moblab] Update the base container generation script

Added numpy and lxml

This was used to generate moblab_base_08 and above.

TEST=manually run
BUG=chromium:933932

Change-Id: If72d9159a4c3cf1161b279d414d8a777feb2956c
Reviewed-on: https://chromium-review.googlesource.com/1482071
Commit-Ready: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Matt Mallett <mattmallett@chromium.org>
1 file changed