[presubmit] Add python formatting check
[presubmit] Add python formatting check

Add check_python parameter to CheckPatchFormatted to check that python
files are well formatted.

Change-Id: Ibd20d5ec9d1d5142a26f7f4cd5f05c51223da6ca
Reviewed-on: https://chromium-review.googlesource.com/1081342
Commit-Queue: Nodir Turakulov <ef4933a197ef7b4b3f55f1bec4942aead3637a2a@chromium.org>
Reviewed-by: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools