internal/syscall/windows: regenerate zsyscall_windows.go

internal/syscall/windows: regenerate zsyscall_windows.go

CL 463219 broke TestAllDependencies because zsyscall_windows.go
was not correctly formatted, probably edited by hand.

The failure was not catch by the CL builders because it is
only failing on linux longtests builders, which was not executed.
Windows builders skip that test because it lacks of the `diff` command.

Change-Id: Id02992d71be2db7e9d3d169545679ab957f3be7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/463841
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>