amberc.js: move splitting of js/st files in handle_options
amberc.js: move splitting of js/st files in handle_options
matthias-springer/amber-athens,amber-smalltalk/amber,amber-smalltalk/amber,amber-smalltalk/amber,adrian-castravete/amber,adrian-castravete/amber,matthias-springer/amber-athens,adrian-castravete/amber,matthias-springer/amber-athens