Upstart 1.13.2 released

Written for upstart by James Hunt on 2014-09-04

Bug fix release:

* Enforce 'initctl set-env' from being called from system job
  (LP: #1356824).
* Defer use of remove-on-empty to stop session-level cgroup jobs
  from racing with cgmanager which can remove the cgroup before
  subsequent job processes have been moved into them
  (LP: #1357252).