Bug 1291365 - Add run-task to ubuntu1604-test image; r=dustin

MozReview-Commit-ID: 4GCJs6lQt3u

--HG--
extra : rebase_source : 229d5fc18864125a045f007f8dd345e9a99a74b4

testing/docker/ubuntu1604-test/Dockerfile

@@ -14,6 +14,9 @@ ADD topsrcdir/testing/docker/recipes/install-mercurial.sh /setup/install-mercuri
 ADD           system-setup.sh   /tmp/system-setup.sh
 RUN           bash /tmp/system-setup.sh
 
+# %include testing/docker/recipes/run-task
+ADD topsrcdir/testing/docker/recipes/run-task /home/worker/bin/run-task
+
 # Set variable normally configured at login, by the shells parent process, these
 # are taken from GNU su manual
 ENV           HOME          /home/worker