[alln][fdio] Move //zircon/system/ulib/fdio to //sdk/lib/fdio

Bug: 54057
Change-Id: I914dd3e8bf6f9643307cc57a27f39655cbf50ea2
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/400422
Reviewed-by: P.Y. Laligand <pylaligand@google.com>
3 files changed