清单文件（用于描述构建中使用的所有资源包）的路径（可选）。
When you call BuildPipeline.BuildAssetBundles to create your AssetBundles, Unity will also generate a manifest file with a filename matching the parent directory name and ".manifest" as its extension.
You can assign the path to this manifest file to assetBundleManifestPath to ensure that a player build does not strip any types used in the AssetBundles that you built.
You do not need to set this property when you use link.xml files, or if you generate AssetBundles using the Addressables package.
See Managed code stripping for more information about code stripping.