Test: Add availability annotations to ModuleInterface/global-actor.swift.

Author: tshortli

test/ModuleInterface/global-actor.swift

@@ -9,29 +9,36 @@
 // CHECK-NOT: $GlobalActors
 
 // CHECK: @globalActor public struct GlobalActor {
+@available(SwiftStdlib 5.1, *)
 @globalActor public struct GlobalActor {
   public actor Actor { }
   public static let shared = Actor()
 }
 
 // CHECK: @Test.GlobalActor public func funcBoundToGlobalActor()
+@available(SwiftStdlib 5.1, *)
 @GlobalActor public func funcBoundToGlobalActor() { }
 
 // CHECK: public func funcWithParameterBoundToGlobalActor(_ x: Test.ClassBoundToGlobalActor)
+@available(SwiftStdlib 5.1, *)
 public func funcWithParameterBoundToGlobalActor(_ x: ClassBoundToGlobalActor) { }
 
-// CHECK: @_hasMissingDesignatedInitializers @Test.GlobalActor public class ClassBoundToGlobalActor
+// CHECK: @Test.GlobalActor public class ClassBoundToGlobalActor
+@available(SwiftStdlib 5.1, *)
 @GlobalActor public class ClassBoundToGlobalActor { }
 
 // CHECK: extension Test.ClassBoundToGlobalActor
+@available(SwiftStdlib 5.1, *)
 extension ClassBoundToGlobalActor {
   public func someMethod() { }
 }
 
-// CHECK: @_inheritsConvenienceInitializers @_hasMissingDesignatedInitializers @Test.GlobalActor public class DerivedFromClassBoundToGlobalActor : Test.ClassBoundToGlobalActor
+// CHECK: @Test.GlobalActor public class DerivedFromClassBoundToGlobalActor : Test.ClassBoundToGlobalActor
+@available(SwiftStdlib 5.1, *)
 public class DerivedFromClassBoundToGlobalActor: ClassBoundToGlobalActor {}
 
 // CHECK: public class NoActorClass
+@available(SwiftStdlib 5.1, *)
 public class NoActorClass {
   // CHECK: @Test.GlobalActor public var varBoundToGlobalActor: Swift.Int
   @GlobalActor public var varBoundToGlobalActor: Int