presubmit: Fix CheckOwnersFormat
presubmit: Fix CheckOwnersFormat

Fix CheckOwnersFormat so that it checks the new OWNERS files instead of the
original ones.

Change-Id: I4abb1cfc847bd28f45b9948fe7775c10dcc8a420
Reviewed-on: https://chromium-review.googlesource.com/c/1382946
Reviewed-by: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>
Commit-Queue: Edward Lesmes <d05609f027dc667cc37492b1dc1bdea5d60fa82a@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools