When we have just os-root fs image and don't have
os-var-log fs image while / and /var/log are supposed to be
separate file systems and os-var-log is mounted into
non-empty directory on the / file system, those files in /var/log
directory become unavailable.
The thing is that among those file there is /var/log/upstart
where upstart daemon writes its logs. We have specific upstart job
which is to flush open files once all file systems are mounted.
This job needs upstart directory to be available on os-var-log
file system.
This is just a temporary fix and correct fix will be available soon
via updates.
Change-Id: Idfea34541e9aabdd22455456c082d78da42657f9
Related-Bug: #1494684
50e90af6e3