Added tools/bots/editor.py to build the editor (using gyp/build.py) and run editor tests

tools/bots/bot.py

 #!/usr/bin/python
 
 # Copyright (c) 2012, the Dart 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 file.
 
 """
 Shared code for use in the buildbot scripts.
 """
 
@@ skipping 68 matching lines @@
 
   If swallow_error is True, then this will catch and discard any OSError that
   is thrown. This lets you run later BuildSteps if the current one fails.
   """
   def __init__(self, name, swallow_error=False):
     self.name = name
     self.swallow_error = swallow_error
 
   def __enter__(self):
     print '@@@BUILD_STEP %s@@@' % self.name
+    sys.stdout.flush()
 
   def __exit__(self, type, value, traceback):
     if value:
       print '@@@STEP_FAILURE@@@'
+      sys.stdout.flush()
       if self.swallow_error and isinstance(value, OSError):
         return True
 
 
 def BuildSDK(build_info):
   """
   Builds the SDK.
 
   - build_info: the buildInfo object, containing information about what sort of
       build and test to be run.
@@ skipping 128 matching lines @@
   if exit_code != 0:
     raise OSError(exit_code)
 
 
 def GetStepName(name, flags):
   """
   Filters out flags with '=' as this breaks the /stats feature of the buildbot.
   """
   flags = [x for x in flags if not '=' in x]
   return ('%s tests %s' % (name, ' '.join(flags))).strip()