关于构建AssetBundle哈希冲突的问题

起因：我们在打Bundle 的时候出现了同一个AB里面有相同文件名字的文件（虽然路径不同），具体报错如下：

14:22:18 Building AssetBundle failed because hash collision was detected in the deterministic id generation.
14:22:18 Conflict happened between Asset "Assets/GameAsset/Config/HMT/RofBonus.json" and "Assets/GameAsset/Config/SEA/RofBonus.json

上面报错的两个文件可以看到是文件名相同，文件路径不同。

该报错只有在指定了变体Variant值的时候才会出现。

该BUG在Unity2019.4还未修复：https://issuetracker.unity3d.com/issues/assetbundle-collision-when-building-assetbundles