Update vendor

vendor/github.com/rancher/norman/signal/sigterm.go

@@ -0,0 +1,28 @@
+package signal
+
+import (
+	"context"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/sirupsen/logrus"
+)
+
+func SigTermCancelContext(ctx context.Context) context.Context {
+	term := make(chan os.Signal)
+	signal.Notify(term, os.Interrupt, syscall.SIGTERM)
+
+	ctx, cancel := context.WithCancel(ctx)
+
+	go func() {
+		select {
+		case <-term:
+			logrus.Infof("Received SIGTERM, cancelling")
+			cancel()
+		case <-ctx.Done():
+		}
+	}()
+
+	return ctx
+}