`PackageDescription` should be importable in Playground for Xcode 9.

Originator:Norio.Nomura
Number:rdar://33256665 Date Originated:uly 12 2017, 2:39 PM
Status:open Resolved:
Product:Xcode 9 beta 3 Product Version:
Classification: Reproducible:
 
Summary:
It will be helpful for writing `Package.swift`.

Steps to Reproduce:
1. Create Playground on Xcode 9
2. Add following code in Playground Page
```swift
import PackageDescription
```

Expected Results:
3. No error would be produced by Xcode 9

Observed Results:
3. Following error was produced by Xcode 9
Playground execution failed:

error: PlayNow-20170712.playground:3:8: error: no such module 'PackageDescription'
import PackageDescription
       ^

Version:
Xcode 9 beta 3

Notes:


Configuration:

Comments


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