Vendor containers/storage, update containers/image

Vendor containers/storage, and its dependencies github.com/pborman/uuid
and github.com/mistifyio/go-zfs, which we didn't already use.

Update the build Dockerfile to install their dependencies.

Add scriptlets that try to detect whether or not we need to use the
"libdm_no_deferred_remove" and/or "btrfs_noversion" build tags.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

vendor/github.com/containers/storage/pkg/system/umask.go

@@ -0,0 +1,13 @@
+// +build !windows
+
+package system
+
+import (
+	"syscall"
+)
+
+// Umask sets current process's file mode creation mask to newmask
+// and returns oldmask.
+func Umask(newmask int) (oldmask int, err error) {
+	return syscall.Umask(newmask), nil
+}