ipc: use simplified fork of winio

ipc/winpipe/mksyscall.go

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2005 Microsoft
+ * Copyright (C) 2017-2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package winpipe
+
+//go:generate go run $GOROOT/src/syscall/mksyscall_windows.go -output zsyscall_windows.go pipe.go sd.go file.go