If a container ceases to exist in runc, set exit status

When we scan a container in runc and see that it no longer
exists, we already set ContainerStatusExited to indicate that it
no longer exists in runc. Now, also set an exit code and exit
time, so PS output will make some sense.

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

libpod/oci.go

@@ -508,6 +508,8 @@ func (r *OCIRuntime) updateContainerStatus(ctr *Container, useRunc bool) error {
 		}
 		if strings.Contains(string(out), "does not exist") {
 			ctr.removeConmonFiles()
+			ctr.state.ExitCode = -1
+			ctr.state.FinishedTime = time.Now()
 			ctr.state.State = ContainerStateExited
 			return nil
 		}