Alphabetize .arclint linters
Summary: I'm a bit OCD with this, but I find the .arclint file easier to read if the keys are in alphabetical order.
Test Plan: N/A
Reviewers: Blessed Reviewers, epriestley
Reviewed By: Blessed Reviewers, epriestley
Subscribers: epriestley, Korvin
Differential Revision: https://secure.phabricator.com/D9802