internal/syscall/windows: fix ReOpenFile sentinel error value

ReOpenFile is documented to return INVALID_HANDLE_VALUE on error,
but the previous definition was checking for 0 instead.

Change-Id: Idec5e75e40b9f6c409e068d63a9b606781e80a46
Reviewed-on: https://go-review.googlesource.com/c/go/+/717320
Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Michael Pratt <mpratt@google.com>

Author: qmuntal

src/internal/syscall/windows/syscall_windows.go

@@ -531,7 +531,7 @@ const (
 //sys	GetOverlappedResult(handle syscall.Handle, overlapped *syscall.Overlapped, done *uint32, wait bool) (err error)
 //sys	CreateNamedPipe(name *uint16, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error)  [failretval==syscall.InvalidHandle] = CreateNamedPipeW
 
-//sys	ReOpenFile(filehandle syscall.Handle, desiredAccess uint32, shareMode uint32, flagAndAttributes uint32) (handle syscall.Handle, err error)
+//sys	ReOpenFile(filehandle syscall.Handle, desiredAccess uint32, shareMode uint32, flagAndAttributes uint32) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle]
 
 // NTStatus corresponds with NTSTATUS, error values returned by ntdll.dll and
 // other native functions.