vendor: _actually_ update containers/storage?

I obviously bungled my attempt in #1391 so this is fixing that.

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

vendor/github.com/containers/storage/lockfile_linux.go

@@ -0,0 +1,20 @@
+// +build linux solaris
+
+package storage
+
+import (
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+// TouchedSince indicates if the lock file has been touched since the specified time
+func (l *lockfile) TouchedSince(when time.Time) bool {
+	st := unix.Stat_t{}
+	err := unix.Fstat(int(l.fd), &st)
+	if err != nil {
+		return true
+	}
+	touched := time.Unix(st.Mtim.Unix())
+	return when.Before(touched)
+}