Use the `raw` formatter for `coffeelint`
Use the `raw` formatter for `coffeelint`

Summary: Using `--reporter=raw` exposes raw JSON output rather than a limited XML output. This allows us to pull more context from the `coffeelint` output.

Test Plan: `arc unit`

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11320

julkiewicz/arcanist,julkiewicz/arcanist,julkiewicz/arcanist,julkiewicz/arcanist