Bug 1469610: [taskgraph] Use `action.taskGroupId` to set `ACTION_TASK_GROUP_ID`; r=dustin This makes it consistent with everywhere else in `.taskcluster.yml` where we refer to the action task group. Differential Revision: https://phabricator.services.mozilla.com/D1707

python
import sys
sys.path.append('third_party/python/gdbpp/')
import gdbpp
end