[Test] Disabled rdar64672291.swift when appropriate.

The test requires execution and to be run with the just-built stdlib.
These fixes were already made on master.

Author: nate-chandler

validation-test/Runtime/rdar64672291.swift

@@ -1,5 +1,7 @@
 // RUN: %target-run-simple-swift
 // REQUIRES: objc_interop
+// REQUIRES: executable_test 
+// UNSUPPORTED: use_os_stdlib
 
 import Foundation