Compiling for prod generate error from debug-js

Compiling with ```royale serve:prod``` seem to first compile js-debug, and second to compile (and not only minifying ?) js-prod from js-debug.

While doing second one, i get a chunk of WARNING and ERROR on the js-debug, such as:
com.google.javascript.jscomp.LoggerErrorManager println
SEVERE: [...]/RoyalProyekt/tests/bin/js-debug/org/apache/royale/utils/Language.js:12: ERROR - required "goog.DEBUG" namespace never provided
goog.require('goog.DEBUG');

com.google.javascript.jscomp.LoggerErrorManager println
SEVERE: [...]/RoyalProyect/tests/bin/js-debug/io/nfg/wmg/battle/modes/StayAlive.js:12: ERROR - required "io.nfg.wmg.battle.BattleLogic" namespace not provided yet
goog.require('io.nfg.wmg.battle.BattleLogic');

Start by reproducing `royale serve:prod` and compare the js-debug and js-prod compilation stages. Use the reported errors in `Language.js` and `StayAlive.js` as entry points, and consider the production build complete when the second compilation finishes without the reported namespace warnings and errors.

Written by the indexing model from the issue text.