Update project authors statements to Dartino

platforms/stm/disco_fletch/src/main.cc

-// Copyright (c) 2016, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2016, the Dartino project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 #include <stm32f7xx_hal.h>
 #include <stm32746g_discovery_sdram.h>
 #include <cmsis_os.h>
 
 #include "src/shared/assert.h"
 
 #include "platforms/stm/disco_fletch/src/page_allocator.h"
@@ skipping 122 matching lines @@
   osThreadDef(mainTask, FletchEntry, osPriorityNormal, 0, 4 * 1024);
   osThreadId mainTaskHandle = osThreadCreate(osThread(mainTask), NULL);
   USE(mainTaskHandle);
 
   // Start the scheduler.
   osKernelStart();
 
   // We should never get as the scheduler should never terminate.
   FATAL("Returned from scheduler");
 }