[Build] Output JSCS reports

[VWoeltjen]

Records any style violations to dist/reports/checkstyle. Note that jscs-html-reporter doesn't allow file path/name to be specified, so an explicit move is triggered after the reporting step is finished.

Author Checklist

1. Changes address original issue? Y
2. Unit tests included and/or updated with changes? N/A
3. Command line build passes? Y
4. Changes have been smoke-tested? Y

[larkin]

Reviewer Checklist

1. Changes appear to address issue? Y
2. Appropriate unit tests included? N/A, build only change.
3. Code style and in-line documentation are appropriate? Y
4. Commit messages meet standards? Y