niflib: update xml. Fix skin partition algorithm for Fallout3

include/gen/DecalVectorArray.h

include/gen/enums.h

include/gen/enums_intl.h

include/gen/hkTriangle.h

include/obj/BSShaderTextureSet.h

src/gen/BodyPartList.cpp

src/gen/DecalVectorArray.cpp

src/gen/enums.cpp

src/gen/hkTriangle.cpp

src/obj/BSDecalPlacementVectorExtraData.cpp

src/obj/NiSkinPartition.cpp

src/obj/hkPackedNiTriStripsData.cpp