library/GSM_Types: rename f_{enc->build}_BcdMccMnc[_int]()

The enc_* functions usually return an octetstring.  However, both
f_enc_BcdMccMnc[_int]() return a sub-type of hexstring (BcdMccMnc),
so let's rename them to avoid confusion.

A follow-up patch adds the actual encoding function for BcdMccMnc.

Change-Id: I0332fe7396310da49910e89571f7181fb1604182
diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn
index a537b96..affe41d 100644
--- a/pcu/PCU_Tests.ttcn
+++ b/pcu/PCU_Tests.ttcn
@@ -5134,7 +5134,7 @@
 
 private function f_outbound_nacc_rim_tx_resp(PCUIF_info_ind info_ind)
 runs on RAW_PCU_Test_CT {
-	var BssgpCellId src := valueof(ts_BssgpCellId(ts_RAI(ts_LAI(f_enc_BcdMccMnc_int(info_ind.mcc, info_ind.mnc, info_ind.mnc_3_digits == 1),
+	var BssgpCellId src := valueof(ts_BssgpCellId(ts_RAI(ts_LAI(f_build_BcdMccMnc_int(info_ind.mcc, info_ind.mnc, info_ind.mnc_3_digits == 1),
 								    info_ind.lac),
 							     info_ind.rac),
 						      info_ind.cell_id));
@@ -5159,7 +5159,7 @@
 altstep as_outbound_nacc_rim_resolve(PCUIF_info_ind info_ind, boolean do_answer := true, boolean do_repeat := false)
 runs on RAW_PCU_Test_CT {
 	/* RIM procedure: */
-	var BssgpCellId src := valueof(ts_BssgpCellId(ts_RAI(ts_LAI(f_enc_BcdMccMnc_int(info_ind.mcc, info_ind.mnc, info_ind.mnc_3_digits == 1),
+	var BssgpCellId src := valueof(ts_BssgpCellId(ts_RAI(ts_LAI(f_build_BcdMccMnc_int(info_ind.mcc, info_ind.mnc, info_ind.mnc_3_digits == 1),
 								    info_ind.lac),
 							     info_ind.rac),
 						      info_ind.cell_id));
@@ -5627,7 +5627,7 @@
 	var GsmArfcn req_arfcn := 862;
 	var uint6_t req_bsic := 43;
 	var boolean use_old_ctrl_iface := mp_ctrl_neigh_ip != "";
-	var BssgpCellId src := valueof(ts_BssgpCellId(ts_RAI(ts_LAI(f_enc_BcdMccMnc_int(info_ind.mcc, info_ind.mnc, info_ind.mnc_3_digits == 1), /* '262F42'H */
+	var BssgpCellId src := valueof(ts_BssgpCellId(ts_RAI(ts_LAI(f_build_BcdMccMnc_int(info_ind.mcc, info_ind.mnc, info_ind.mnc_3_digits == 1), /* '262F42'H */
 								    info_ind.lac),
 							     info_ind.rac),
 						      info_ind.cell_id));