Don't exclude gaia soldiers and structures the killed entities statistics, but only animals.
This is especially relevant for triggerscript maps with spawned gaia units, such as Jebel Barkal, Danubius, Survival Of The Fittest.

Differential Revision: https://code.wildfiregames.com/D1384
Reviewed By: temple
Cheering By: bb, fpre, Imarok