Update flags for coffeelint

Summary: According to coffeelint --help (with an up-to-date version of coffeelint, version 1.8.1) , --nocolor is deprecated in favor of --color=never. According to the changelog, --nocolor was deprecated in v1.6.0.

Test Plan: arc lint

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11195