cmd: update x/tools@4df13e3

cmd: update x/tools@4df13e3

This includes only a couple of minor cmd/vet fixes for new(expr).

    export GOWORK=off
    cd src/cmd
    go get golang.org/x/tools@4df13e3
    go mod tidy
    go mod vendor

For #45624

Change-Id: Iafba4350d321d6cd1fcc91a062e2c150e3f4d553
Reviewed-on: https://go-review.googlesource.com/c/go/+/706735
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>