Remove landing Orbital Commands from the build order

[StoicLoofah]

http://spawningtool.com/16875/

So both landing Orbital Commands and morphing them count as UnitTypeChangeEvents, which is unfortunate because we get extra entries for landing buildings. With the data given, I actually don't know how to disambiguate those 2 things at the moment, but I'll need to do some digging.

I wonder whether I'm actually handling landing builds properly at all. Ugh, this UnitTypeChangeEvent seems to be more complicated than I had anticipated...

[StoicLoofah]

Another example http://lotv.spawningtool.com/4622/