Update Vendor

(*) github.com/Microsoft/hcsshim
    (*) golang.org/x/sys
    (*) github.com/x/cyrpto
    (*) github.com/sirupsen/logrus
    (*) github.com/Microsoft/go-winio
    (*) github.com/juju/errors
    (*) github.com/buger/jsonparser

vendor/github.com/Microsoft/hcsshim/internal/wclayer/getsharedbaseimages.go

@@ -0,0 +1,26 @@
+package wclayer
+
+import (
+	"github.com/Microsoft/hcsshim/internal/hcserror"
+	"github.com/Microsoft/hcsshim/internal/interop"
+	"github.com/sirupsen/logrus"
+)
+
+// GetSharedBaseImages will enumerate the images stored in the common central
+// image store and return descriptive info about those images for the purpose
+// of registering them with the graphdriver, graph, and tagstore.
+func GetSharedBaseImages() (imageData string, err error) {
+	title := "hcsshim::GetSharedBaseImages "
+
+	logrus.Debugf("Calling proc")
+	var buffer *uint16
+	err = getBaseImages(&buffer)
+	if err != nil {
+		err = hcserror.New(err, title, "")
+		logrus.Error(err)
+		return
+	}
+	imageData = interop.ConvertAndFreeCoTaskMemString(buffer)
+	logrus.Debugf(title+" - succeeded output=%s", imageData)
+	return
+}