Fix fault include.
Submitted by Arpadffy Zoltan <Zoltan.Arpadffy@scientificgames.se>

PR: 2393

Thank you\!
(note: not tested for now, a few nightly builds should give indications though)

engine ;-)

Redo the loop so it really compiles all objects for one engine, then
links the engine (until now, it still thought every file was an engine
of its own...).

dynamic loading is consistent with respect to engine ids.

specified...

(I really need to review my knowledge of the language)

Currently, we simply assume that they shall always be built as
shareable images.