ipaccess-config / network listen: ordered list of RxLevels

Use libosmocore 'rxlev_stat' module to generate an ordered list
of ARFCN's, sorted by RxLev while performing test nr. 64
diff --git a/openbsc/include/openbsc/abis_nm.h b/openbsc/include/openbsc/abis_nm.h
index 13c0746..7672bb1 100644
--- a/openbsc/include/openbsc/abis_nm.h
+++ b/openbsc/include/openbsc/abis_nm.h
@@ -106,8 +106,7 @@
 
 int abis_nm_perform_test(struct gsm_bts *bts, u_int8_t obj_class,
 			 u_int8_t bts_nr, u_int8_t trx_nr, u_int8_t ts_nr,
-			 u_int8_t test_nr, u_int8_t auton_report,
-			 const u_int8_t *phys_config, u_int16_t phys_config_len);
+			 u_int8_t test_nr, u_int8_t auton_report, struct msgb *msg);
 
 int abis_nm_chcomb4pchan(enum gsm_phys_chan_config pchan);