Magicbit Variant (#3107)

* Updated magicbit variant

* Added LED_BUILTIN

Author: Magicblocks

boards.txt

@@ -364,7 +364,7 @@ magicbit.serial.disableRTS=true
 
 magicbit.build.mcu=esp32
 magicbit.build.core=esp32
-magicbit.build.variant=esp32
+magicbit.build.variant=magicbit
 magicbit.build.board=ESP32_DEV
 
 magicbit.build.f_cpu=240000000L

variants/magicbit/pins_arduino.h

@@ -66,6 +66,6 @@ static const uint8_t MOTOR1A = 32;
 static const uint8_t MOTOR1B = 33;
 static const uint8_t MOTOR2A = 16;
 static const uint8_t MOTOR2B = 17;
-
+static const uint8_t LED_BUILTIN=16;
 
 #endif /* Pins_Arduino_h */