[concurrency] update test missed in swiftlang#34640, resolving rdar://71212904

kavon · kavon · commit 52bc1cbb6e72 · 2020-11-09T15:52:41.000-08:00
diff --git a/test/IRGen/ptrauth-actor.swift b/test/IRGen/ptrauth-actor.swift
@@ -6,6 +6,7 @@
 // REQUIRES: OS=macosx
 
 import Swift
+import _Concurrency
 
 public actor class A1 {
   var x: Int = 17
