https://github.com/flutter/engine/blob/master/.ci.yaml#L160-L176

This causes these builds to always be run on presubmit, even if the change was just a markdown.

See flutter/engine#29566 where these were run on a darwin only change.

Adding some paths in the runif for where Fuchsia code is would help prevent unnecessary testing