Merge pull request #37245 from jckarter/objc-async-bridge-block-captures-5.5

[5.5] Update test to behave more deterministically

Author: jckarter

test/Concurrency/Runtime/objc_async.swift

@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-clang -fobjc-arc %S/Inputs/objc_async.m -c -o %t/objc_async_objc.o
-// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency -parse-as-library -module-name main -import-objc-header %S/Inputs/objc_async.h %s %t/objc_async_objc.o -o %t/objc_async
+// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency -Xfrontend -disable-availability-checking -parse-as-library -module-name main -import-objc-header %S/Inputs/objc_async.h %s %t/objc_async_objc.o -o %t/objc_async
 // RUN: %target-run %t/objc_async | %FileCheck %s
 
 // REQUIRES: executable_test
@@ -50,6 +50,8 @@ class Clbuttic: Butt {
     // CHECK-NEXT: called into override
     // CHECK-NEXT: butt {{.*}} named clbuttic occurred at 679
     scheduleButt(Clbuttic(), "clbuttic")
+
+    await Task.sleep(500_000)
   }
 }