WaitCompletionPacket is a kernel object that, when associated with a target object and a completion object and when the target object is signaled, adds the completion information stored in itself to the completion object.
For React Native.
-- v3: ntdll: Implement NtCancelWaitCompletionPacket(). ntdll: Implement NtAssociateWaitCompletionPacket(). ntdll: Implement NtCreateWaitCompletionPacket(). ntdll/tests: Add NtCancelWaitCompletionPacket() tests. ntdll/tests: Add NtAssociateWaitCompletionPacket() tests. ntdll/tests: Add NtCreateWaitCompletionPacket() tests. ntdll/tests: Add WaitCompletionPacket object tests.