Windows: Updates Windows Vendoring

Updates windows dependent libraries for vendoing.

vendor/github.com/Microsoft/hcsshim/cmd/wclayer/wclayer.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/Microsoft/hcsshim"
+	"github.com/urfave/cli"
+)
+
+// Add a manifest to get proper Windows version detection.
+//
+// goversioninfo can be installed with "go get github.com/josephspurrier/goversioninfo/cmd/goversioninfo"
+
+//go:generate goversioninfo -platform-specific
+
+var usage = `Windows Container layer utility
+
+wclayer is a command line tool for manipulating Windows Container
+storage layers. It can import and export layers from and to OCI format
+layer tar files, create new writable layers, and mount and unmount
+container images.`
+
+var driverInfo = hcsshim.DriverInfo{}
+
+func main() {
+	app := cli.NewApp()
+	app.Name = "wclayer"
+	app.Commands = []cli.Command{
+		createCommand,
+		exportCommand,
+		importCommand,
+		mountCommand,
+		removeCommand,
+		unmountCommand,
+	}
+	app.Usage = usage
+
+	if err := app.Run(os.Args); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func normalizeLayers(il []string, needOne bool) ([]string, error) {
+	if needOne && len(il) == 0 {
+		return nil, errors.New("at least one read-only layer must be specified")
+	}
+	ol := make([]string, len(il))
+	for i := range il {
+		var err error
+		ol[i], err = filepath.Abs(il[i])
+		if err != nil {
+			return nil, err
+		}
+	}
+	return ol, nil
+}