Change generate to accept list of tests

BUG=chromium:1051691
TEST=emerge and run_tests.sh

Change-Id: I7fcab4cb6cb8434b06d6f01a47397dd7bed8b64d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/tnull/+/2309150
Commit-Queue: Jacob Kopczynski <jkop@chromium.org>
Tested-by: Jacob Kopczynski <jkop@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
Auto-Submit: Jacob Kopczynski <jkop@chromium.org>
4 files changed