lucetc does not procude reproducible .so/.dylib files
While we are about to land RLBox support on nightly we should start thinking about the reproducibility story. In fact, we already know that
lucetc does not produce reproducible .so/.dylib files. We need to fix that for our alpha transition.
Mozilla's corresponding bug is https://bugzilla.mozilla.org/show_bug.cgi?id=1612035.