Add some example .arclint files to un-lie the pending documentation

Summary: Ref T2039. Provide some examples to help users figure out how to write these things.

Test Plan: Checked them with jsonlint.

Reviewers: btrahan, joshuaspence

Reviewed By: joshuaspence

Subscribers: epriestley

Maniphest Tasks: T2039

Differential Revision: https://secure.phabricator.com/D9065