Enabling multi-ue support in the open-source L2 proxy.

MR-2401 changed the argument to the init_nrUE_standalone_thread
to be zero instead of the ue_id_g. This causes every port to be
opened for multiple UEs to have the same value, therefore only
allowing one UE to be connected to the proxy. If the ue_id_g
global is an issue, we should open a new ticket for a proper fix.

openair2/RRC/NR_UE/rrc_UE.c

@@ -1674,8 +1674,8 @@ void start_oai_nrue_threads()
       LOG_E(MAC, "sem_init() error\n");
       abort();
     }
-
-    init_nrUE_standalone_thread(0);
+    extern uint16_t ue_id_g;
+    init_nrUE_standalone_thread(ue_id_g);
 }
 
 static void nsa_rrc_ue_process_ueCapabilityEnquiry(void)