Ignore FileName cop for scss-lint binary

Hyphens are better than underscores when it comes to command line tools.

Change-Id: I5151dd6bc6393aceb0eeea6cb558aad180082d0e
Reviewed-on: http://gerrit.causes.com/36704
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>