[SR-8186] Migrated UIKit NSNotification.Name code cannot build due to missing import

[ChristopherRogers]

Previous ID	SR-8186
Radar	rdar://problem/41850977
Original Reporter	@ChristopherRogers
Type	Bug

Environment

Xcode 10.0 beta 3 (10L201y)

Additional Detail from JIRA

Votes	0
Component/s	Source Tooling
Labels	Bug, Migrator
Assignee	None
Priority	Medium

md5: 39c49486104e622d2f435b35a231dc4c

Issue Description:

I don't see how this was building before but I guess the migrator should add `import UIKit` if it's missing since it builds in Swift 4.0.

import Foundation

func notificationFromModuleNotImported() -> Notification.Name {
  // Use of unresolved identifier 'UIApplication'
  // return UIApplication.willEnterForegroundNotification
  return .UIApplicationWillEnterForeground
}

I've attached a sample Xcode project for several issues to SR-8180.

[belkadan]

Hm, it does seem weird that this was building at all before. Needs investigation.

@swift-ci create

[keith]

We had a bunch of this same case.