Rename fletch -> dartino

platforms/stm/stm.gyp

 # 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.
 
 {
   'targets': [
      {
       'target_name': 'demos',
       'type': 'none',
       'dependencies': [
         'stm32_cube_f7_demos.gyp:STemWin_HelloWorld',
         'stm32_cube_f7_demos.gyp:Audio_playback_and_record',
         'stm32_cube_f7_demos.gyp:LwIP_HTTP_Server_Netconn_RTOS',
         'stm32_cube_f7_demos.gyp:Demonstration',
       ],
     },
     {
-      'target_name': 'disco_fletch',
+      'target_name': 'disco_dartino',
       'type': 'none',
       'dependencies': [
-        'disco_fletch/disco_fletch.gyp:disco_fletch',
+        'disco_dartino/disco_dartino.gyp:disco_dartino',
       ],
     },
   ],
 }