tests: Cover both binary search branches in hostapd_maclist_found()

Signed-off-by: Jouni Malinen <j@w1.fi>

tests/hwsim/hostapd.macaddr

@@ -3,3 +3,5 @@
 02:00:00:00:00:34
 -02:00:00:00:00:12
 -02:00:00:00:00:34
+01:01:01:01:01:01
+03:01:01:01:01:03