Improve power consumption and SLEEP mode :

- Disable IDLE hook (it would wake the device up as soon as possible).
 - Logger task sleep for 100ms (disable logging for better battery life)
 - Logging is disabled by default
 - Apply fix for ERRATA 87 (clear FPU interrupt before going to sleep). Ports files from FreeRTOS are now in the sources (they where in the SDK before)

src/main.cpp

@@ -36,16 +36,6 @@ Pinetime::Controllers::DateTime dateTimeController;
 static constexpr uint8_t pinButton = 13;
 static constexpr uint8_t pinTouchIrq = 28;
 
-extern "C" {
-  void vApplicationIdleHook() {
-    logger.Resume();
-  }
-
-  void vApplicationStackOverflowHook( xTaskHandle *pxTask, signed portCHAR *pcTaskName ) {
-    bsp_board_led_on(3);
-  }
-}
-
 void nrfx_gpiote_evt_handler(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
   if(pin == pinTouchIrq) {
     displayApp->PushMessage(Pinetime::Applications::DisplayApp::Messages::TouchEvent);