cloud-init-local depends on /run. reflect that in upstart job.

With the writing of cloud-init status, cloud-init-local needs to
have /run mounted.  The issue we were seeing was a race where:
 cloud-init-local creates /run/cloud-init
 /run is mounted
 cloud-init-local tries to link a file into /run/cloud-init

that directory was no longer visisable as /run was mounted over
the top.