openssh: add /var/log/lastlog to volatile list

The /var/log/messages reports /var/log/lastlog as missing, since openssh needs this file, create it as a volatile.

[YOCTO #6172]

---
 meta/recipes-connectivity/openssh/openssh/volatiles.99_sshd | 1 +
 1 file changed, 1 insertion(+)

index 122320a..a0d2af3 100644
@@ -1 +1,2 @@
 d root root 0755 /var/run/sshd none
+f root root 0644 /var/log/lastlog none

1.8.3.1