Fix ArcanistJscsLinter unit tests

Summary: These tests are failing with the latest version of jscs (v1.10.0).

Test Plan: arc unit

Reviewers: epriestley, Blessed Reviewers

Reviewed By: epriestley, Blessed Reviewers

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11520