FGenericTextureTilingBuildFunction

This build function expects an implementation of [ITextureTiler](API\Developer\TextureFormat\Interfaces\ITextureTiler) as its template and looks a bit awkward because IBuildFunction is required to not have any state, so we can't put the instance of the [ITextureTiler](API\Developer\TextureFormat\Interfaces\ITextureTiler) on our object - hence the odd statics.