[NaCl SDK Docs] Fix README, cleanup Makefile, remove devsite stuff.

native_client_sdk/src/doc/PRESUBMIT.py

 # Copyright (c) 2012 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.
 
 import subprocess
 
 def _CheckSphinxBuild(input_api, output_api):
   """Check that the docs are buildable without any warnings.
 
   This check runs sphinx-build with -W so that warning are errors.
 
   However, since the trybots don't have sphinx installed, we'll treat a sphinx
   failure as a warning. (Let's trust that the docs editors are testing locally.)
   """
 
   try:
-    # Don't do a full chromesite build (takes about a minute...), just build
-    # the ReST.
-    subprocess.check_output(['make', 'chromesite_rst', 'SPHINXOPTS=-Wa'],
+    subprocess.check_output(['make', 'presubmit', 'SPHINXOPTS=-Wa'],
                             stderr=subprocess.STDOUT)
   except subprocess.CalledProcessError as e:
     return [output_api.PresubmitNotifyResult('sphinx_build failed:\n' +
             e.output)]
 
   return []
 
 
 def CommonChecks(input_api, output_api):
   output = []
   output.extend(_CheckSphinxBuild(input_api, output_api))
   return output
 
 
 def CheckChangeOnUpload(input_api, output_api):
   return CommonChecks(input_api, output_api)
 
 
 def CheckChangeOnCommit(input_api, output_api):
   return CommonChecks(input_api, output_api)