[TaskGroup] for now require macOS on a few tests

Author: ktoso

test/Concurrency/Runtime/async_task_equals_hashCode.swift

@@ -1,8 +1,7 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s --dump-input=always
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency %import-libdispatch -parse-as-library) | %FileCheck %s --dump-input=always
+
 // REQUIRES: executable_test
 // REQUIRES: concurrency
-// REQUIRES: OS=macosx
-// REQUIRES: CPU=x86_64
 
 import Dispatch
 #if canImport(Darwin)

test/Concurrency/Runtime/async_taskgroup_is_asyncsequence.swift

@@ -3,6 +3,9 @@
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: libdispatch
+// FIXME: unlock on other OSes
+// REQUIRES: OS=macosx
+// REQUIRES: CPU=x86_64
 
 import Dispatch
 

test/Concurrency/Runtime/async_taskgroup_throw_recover.swift

@@ -3,6 +3,9 @@
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: libdispatch
+// FIXME: unlock on other OSes
+// REQUIRES: OS=macosx
+// REQUIRES: CPU=x86_64
 
 struct Boom: Error {}
 struct IgnoredBoom: Error {}
@@ -35,7 +38,7 @@ func test_taskGroup_throws() async {
 
       guard let third = try! await group.next() else {
         print("task group failed to get 3")
-        return 0 
+        return 0
       }
 
       print("task group returning normally: \(third)")