fix #5432 by defining exports locally when minifying; this is needed on Firefox, and is local to this script (it doesn't impact exports if defined).
fix #5432 by defining exports locally when minifying; this is needed on Firefox, and is local to this script (it doesn't impact exports if defined).

sagemathinc/smc,sagemathinc/smc,sagemathinc/smc,sagemathinc/smc