Fix sort order for cros_workon info.
Fix sort order for cros_workon info.

cros_workon info currently reports warnings about the sort order being
wrong. This is because we're sorting the results in a different order
from what join expects. We should fix that.

BUG=chromium-os:23909
TEST=Verify warnings are gone.

Change-Id: I021a6ac97f3ebd9d0ce0c6350b8c080e4a42977b
Reviewed-on: https://gerrit.chromium.org/gerrit/12596
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Tested-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Commit-Ready: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Reviewed-by: Mandeep Singh Baines <19acf4ef1f391f4aab404dc5703cac3632e06f3a@chromium.org>

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