Add tools/bots/steps_clank.py script

tools/bots/steps_clank.py

Index: tools/bots/steps_clank.py
diff --git a/runtime/lib/convert_sources.gypi b/tools/bots/steps_clank.py
old mode 100644
new mode 100755
similarity index 69%
copy from runtime/lib/convert_sources.gypi
copy to tools/bots/steps_clank.py
index 0f3b46b87b20a4a8fe86db748dd3fc873c3d20c6..1c8af346e6495547e2000c6d43b56745ff2e104d
--- a/runtime/lib/convert_sources.gypi
+++ b/tools/bots/steps_clank.py
@@ -1,9 +1,12 @@
+#!/usr/bin/python
 # Copyright (c) 2013, 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.
 
-{
-  'sources': [
-    'convert_patch.dart',
-  ],
-}
+import sys
+
+def main():
+  sys.exit(0)
+
+if __name__ == '__main__':
+  main()