Refactor dropped 'python' on action

obj_int_extract.gypi

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Rule to extract integer values for each symbol from an object file.
 # The output file name is the input file name with extension replaced with
 # asm or h.
 # The following gyp variables must be set before including this gypi:
 #   output_format, the output format of integer value.
 #   output_dir, the full path where the output file should be created.
@@ skipping 30 matching lines @@
       'rule_name': 'obj_int_extract',
       'extension': '<(asm_obj_extension)',
       'inputs': [
         '<(PRODUCT_DIR)/libvpx_obj_int_extract',
         'obj_int_extract.py',
       ],
       'outputs': [
         '<(output_dir)/<(RULE_INPUT_ROOT).<(output_extension)',
       ],
       'action': [
+        'python',
         '<(DEPTH)/third_party/libvpx/obj_int_extract.py',
         '-e', '<(PRODUCT_DIR)/libvpx_obj_int_extract',
         '-f', '<(output_format)',
         '-b', '<(RULE_INPUT_PATH)',
         '-o', '<(output_dir)/<(RULE_INPUT_ROOT).<(output_extension)',
       ],
       'message': 'Generate assembly offsets <(RULE_INPUT_PATH)',
     },
   ],
 }