ensure-dirs: don't fail if no rapi log is present

Sometimes a node has never been a master. Or ran rapi. In that case we
need to create the file (because if later rapi gets started, it won't be
able to create it itself).

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

daemons/ensure-dirs.in

@@ -47,6 +47,7 @@ _ensure_rundir() {
 _ensure_logdir() {
   _ensure_dir "${GNTLOGDIR}" 0770 "$(_fileset_owner "daemons")"
 
+  touch "${GNTLOGDIR}/rapi-daemon.log"
   chown $(_fileset_owner "rapi") "${GNTLOGDIR}/rapi-daemon.log"
 }