vendor: update buildkit to v0.17.0-rc2

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/containerd/continuity/fs/fstest/file_unix.go

@@ -1,5 +1,4 @@
 //go:build !windows
-// +build !windows
 
 /*
    Copyright The containerd Authors.
@@ -20,9 +19,11 @@
 package fstest
 
 import (
+	"os"
 	"path/filepath"
 	"time"
 
+	"github.com/containerd/continuity/devices"
 	"github.com/containerd/continuity/sysx"
 	"golang.org/x/sys/unix"
 )
@@ -46,6 +47,14 @@ func Lchtimes(name string, atime, mtime time.Time) Applier {
 	})
 }
 
+// CreateDeviceFile provides creates devices Applier.
+func CreateDeviceFile(name string, mode os.FileMode, maj, min int) Applier {
+	return applyFn(func(root string) error {
+		fullPath := filepath.Join(root, name)
+		return devices.Mknod(fullPath, mode, maj, min)
+	})
+}
+
 func Base() Applier {
 	return applyFn(func(root string) error {
 		// do nothing, as the base is not special