Use baud rate specified by build configuration for serial interface.

This ensures that the baud rate is the same as the one configuring the serial monitor.

Author: dhebbeker

lib/3rd_party_adapters/Arduino/serial_port.cpp

@@ -14,7 +14,7 @@ std::basic_ostream<CharType> &cout = std::cout;
 
 void initialize()
 {
-    Serial.begin(115200);
+    Serial.begin(BAUD_RATE);
     delay(100);
     Serial.flush();
     delay(100);