fix pylint warnings

native_client_sdk/PRESUBMIT.py

Index: native_client_sdk/PRESUBMIT.py
diff --git a/native_client_sdk/PRESUBMIT.py b/native_client_sdk/PRESUBMIT.py
index 1b711b9d0bb7ebf08bb958a73d696173ccd5d2bc..dc0b66c12405be45b4b9abd67db54afeb9e051b3 100644
--- a/native_client_sdk/PRESUBMIT.py
+++ b/native_client_sdk/PRESUBMIT.py
@@ -12,26 +12,15 @@ details on the presubmit API built into gcl.
 def CommonChecks(input_api, output_api):
   output = []
   disabled_warnings = [
+    'F0401',  # Unable to import module
     'R0401',  # Cyclic import
     'W0613',  # Unused argument
     'E1103',  # subprocess.communicate() generates these :(
+    'R0201',  # method could be function (doesn't reference self)
   ]
-  black_list = [r'src/site_scons/.*',
-                r'.*/decode_dump.py',
-                r'src/build_tools/build_sdk.py',
-                r'src/build_tools/buildbot_common.py',
-                r'src/build_tools/buildbot_run.py',
-                r'src/build_tools/build_utils.py',
-                r'src/build_tools/build_updater.py',
-                r'src/build_tools/manifest_util.py',
-                r'src/build_tools/nacl*',
-                r'src/build_tools/generate_make.py',
-                r'src/build_tools/sdk_tools/sdk_update_main.py',
-                r'src/build_tools/sdk_tools/sdk_update.py',
-                r'src/project_templates',
-                r'.*/update_manifest.py',
-                r'.*/update_nacl_manifest.py',
-                r'src/build_tools/tests/.*']
+  black_list = [r'src/build_tools/tests/.*',
+                r'src/site_scons/.*',
+               ]
   canned = input_api.canned_checks
   output.extend(canned.RunPylint(input_api, output_api, black_list=black_list,
                 disabled_warnings=disabled_warnings))