Bug 1460470 - Change run-task to use Python 3 by default; r=mshal
Python 3 is the future.
MozReview-Commit-ID: APuu4Q3mimj
--- a/taskcluster/scripts/run-task
+++ b/taskcluster/scripts/run-task
@@ -1,9 +1,9 @@
-#!/usr/bin/python2.7 -u
+#!/usr/bin/python3 -u
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
"""Run a task after performing common actions.
This script is meant to be the "driver" for TaskCluster based tasks.
It receives some common arguments to control the run-time environment.
