hnb-test: receive Paging, add CL rx

Add ability to receive ConnectionLess transfers in order to read the
Paging and (so far only) print the IMSI paged for.
diff --git a/src/tests/hnb-test-layers.h b/src/tests/hnb-test-layers.h
index ab51ca9..62369f3 100644
--- a/src/tests/hnb-test-layers.h
+++ b/src/tests/hnb-test-layers.h
@@ -6,12 +6,16 @@
 
 /* main calls RUA */
 void hnb_test_rua_dt_handle(struct hnb_test *hnb, struct ANY *in);
+void hnb_test_rua_cl_handle(struct hnb_test *hnb, struct ANY *in);
 
 /* RUA calls RANAP */
 void hnb_test_rua_dt_handle_ranap(struct hnb_test *hnb,
 				  struct ranap_message_s *ranap_msg);
+void hnb_test_rua_cl_handle_ranap(struct hnb_test *hnb,
+				  struct ranap_message_s *ranap_msg);
 
 /* RANAP calls main with actual payload*/
 void hnb_test_nas_rx_dtap(struct hnb_test *hnb, void *data, int len);
 void hnb_test_rx_secmode_cmd(struct hnb_test *hnb, long ip_alg);
 void hnb_test_rx_iu_release(struct hnb_test *hnb);
+void hnb_test_rx_paging(struct hnb_test *hnb, const char *imsi);