[release-branch.go1.25] all: update x/sys

[release-branch.go1.25] all: update x/sys

For #77406

Change-Id: Id15681ea136469fa3b53d163363dec0c6b0893ae
Reviewed-on: https://go-review.googlesource.com/c/go/+/749162
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Mark Freeman <markfreeman@google.com>
Reviewed-by: Mark Freeman <markfreeman@google.com>