how to set `hasBeenReset` to true in order to avoid running onInit?

@gdanov:
See targets/stm32_ll/main.c

bool buttonState = false;
[#ifdef](http://forum.espruino.com/searc­h/?q=%23ifdef) BTN1_PININDEX
  buttonState = jshPinInput(BTN1_PININDEX) == BTN1_ONSTATE;
[#endif](http://forum.espruino.com/searc­h/?q=%23endif)
  jsvInit(0);
  jsiInit(!buttonState); // pressing USER button skips autoload

The code is for the stm32, but it could be replicated for ESP32. Define BTN1_PININDEX (maybe jshardware.c?) and use this code. Actually it would be nice to have it in every board.