Use the ArcanistChmodLinter.
Summary: Apply the ArcanistChmodLinter from D9187.
Test Plan: Removed all other linters from the .arclint file and executed arc lint --everything. Confirmed that there were no issues raised.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: epriestley, Korvin
Differential Revision: https://secure.phabricator.com/D9188