更新了vuforia到最新版，但是运行后unity 报错：
Failed to create Vuforia engine: Vuforia driver library load error
UnityEngine.Debug:LogError (object)
Vuforia.Internal.Utility.UnityLogger:LogError (string)
Vuforia.Internal.Utility.Log:Error (string)
Vuforia.Internal.Core.Engine:AbortInit ()
Vuforia.Internal.Core.Engine:InitOnCameraReady ()
Vuforia.WebCam:HandleFirstWebCamFrame ()
Vuforia.WebCam:<Init>b__34_0 (bool)
Vuforia.Internal.Utility.VuforiaCoroutineUtility/<RunCoroutineWithTimeout>d__1:MoveNext ()
UnityEngine.SetupCoroutine:InvokeMoveNext (System.Collections.IEnumerator,intptr)
研究了一下这个问题，最后还是通过更新Create Test Certificate for Windows Store搞好了。
具体操作办法：Edit——project settings——player——publishing settings——certificate——creat，然后创建一个证书，重新运行就好了
