Changed variable name due to a change in the API between ubuntu 18.04 and ubuntu 20.04

src/can/can.cpp

@@ -233,7 +233,7 @@ unsigned long CCAN::get_last_rx_timestamp(void)
 { 
   struct timeval tv;
   
-  if(ioctl(this->can_socket_fd,SIOCGSTAMP,&tv)==-1)
+  if(ioctl(this->can_socket_fd,SIOCGRARP,&tv)==-1)
   {
     /* handle exceptions */
     throw CCommException(_HERE_,"Impossible to get the last time stamp",this->comm_id);