niflib: Update to Fallout version of xml

Makefile

include/gen/AVObject.h

include/gen/AdditionalDataBlock.h

include/gen/AdditionalDataInfo.h

include/gen/BSSegmentedTriangle.h

include/gen/BSTreadTransfInfo.h

include/gen/BSTreadTransfSubInfo.h

include/gen/BodyPartList.h

include/gen/DecalVectorArray.h

include/gen/HingeDescriptor.h

include/gen/LimitedHingeDescriptor.h

include/gen/RagdollDescriptor.h

include/gen/ShaderTexDesc.h

include/gen/enums.h

include/nif_versions.h

include/obj/BSAnimNotes.h

include/obj/BSBlastNode.h

include/obj/BSDamageStage.h

include/obj/BSDebrisNode.h

include/obj/BSDecalPlacementVectorExtraData.h