Bug 1491371: [comm-task-env] Pass wrapped command name as argv[0]; r=dustin

Differential Revision: https://phabricator.services.mozilla.com/D24415

--HG--
rename : taskcluster/scripts/comm-task-env => taskcluster/docker/decision/comm-task-env
extra : moz-landing-system : lando

taskcluster/docker/decision/Dockerfile

@@ -25,9 +25,7 @@ RUN bash /tmp/system-setup.sh
 # %include taskcluster/scripts/run-task
 ADD topsrcdir/taskcluster/scripts/run-task /builds/worker/bin/run-task
 
-# %include taskcluster/scripts/comm-task-env
-ADD topsrcdir/taskcluster/scripts/comm-task-env \
-    /builds/worker/bin/comm-task-env
+ADD comm-task-env /builds/worker/bin/comm-task-env
 
 ENV PATH=/builds/worker/bin:$PATH \
     SHELL=/bin/bash \

taskcluster/docker/decision/VERSION

@@ -1 +1 @@
-2.2.0
+2.2.1

taskcluster/docker/decision/comm-task-env

@@ -182,7 +182,7 @@ def update_environment(gecko_conf):
 def exec_run_task(args):
     """Executes run-task with a modified environment."""
     print_message("Executing: {}".format(pformat(args)))
-    os.execv(args[0], args[1:])
+    os.execv(args[0], args[0:])
 
 
 def main():