Added target EID tlv to Dua response

This is a change in specification that was missed

Author: Mika Tervonen

source/6LoWPAN/Thread/thread_extension_bbr.c

@@ -872,6 +872,7 @@ static int thread_extension_bbr_dua_cb(int8_t service_id, uint8_t source_address
 
     ptr = payload;
     ptr = thread_tmfcop_tlv_data_write_uint8(ptr, TMFCOP_TLV_STATUS, bbr_status);
+    ptr = thread_meshcop_tlv_data_write(ptr, TMFCOP_TLV_TARGET_EID, 16, addr_data_ptr);
     coap_service_response_send(this->coap_service_id, COAP_REQUEST_OPTIONS_NONE, request_ptr, response_code, COAP_CT_OCTET_STREAM, payload, ptr - payload);
     return 0;
 }