Update project authors statements to Dartino

platforms/stm/free_rtos_sources.gypi

-# Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
+# Copyright (c) 2015, 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.
 
 {
   'variables': {
     'stm32_cube_f7_free_rtos_src':
       '<(stm32_cube_f7)/Middlewares/Third_Party/FreeRTOS/Source/',
   },
   'include_dirs': [
     '<(stm32_cube_f7_free_rtos_src)/',
     '<(stm32_cube_f7_free_rtos_src)/CMSIS_RTOS/',
     '<(stm32_cube_f7_free_rtos_src)/include/',
     '<(stm32_cube_f7_free_rtos_src)/portable/GCC/ARM_CM7/r0p1/',
   ],
   'sources': [
     '<(stm32_cube_f7_free_rtos_src)/croutine.c',
     '<(stm32_cube_f7_free_rtos_src)/event_groups.c',
     '<(stm32_cube_f7_free_rtos_src)/list.c',
     '<(stm32_cube_f7_free_rtos_src)/queue.c',
     '<(stm32_cube_f7_free_rtos_src)/tasks.c',
     '<(stm32_cube_f7_free_rtos_src)/timers.c',
     '<(stm32_cube_f7_free_rtos_src)/CMSIS_RTOS/cmsis_os.c',
     '<(stm32_cube_f7_free_rtos_src)/portable/MemMang/heap_3.c',
     '<(stm32_cube_f7_free_rtos_src)/portable/GCC/ARM_CM7/r0p1/port.c',
   ],
 }