Bastien Bouclet bb813719b5 ENGINES: Change targets to have an 'engine ID'
The engine ID identifies which engine should be used to launch the target.
Also remove the 'single ID' system. Different games from engines that used
that system now have different game IDs.

Also-By: Matthew Hoops <clone2727@gmail.com>
2019-11-03 11:43:00 +01:00
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