Cosmetics. Specify serial number in message while opening

src/lidar_lite.cpp

@@ -47,7 +47,7 @@ CLidarLite::open(void)
     this->adapter_ = new CUSBI2C("adapter");
 
     // open serial port
-    std::cout << "[CLidarLite]: Opening Lidar Lite. " << std::endl;
+    std::cout << "[CLidarLite]: Opening Lidar Lite with serial number: " << this->serial_ << std::endl;
     this->adapter_->open(this->serial_);
     usleep(5000); // Delay to initialize sensor.