Update go-runc to b3c048c028ddd789c6f9510c597f8b9c62f25359

This fixes an issue with Exec not returning a proper error

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>

vendor/github.com/containerd/go-runc/runc.go

@@ -224,7 +224,10 @@ func (r *Runc) Exec(context context.Context, id string, spec specs.Process, opts
 			}
 		}
 	}
-	_, err = Monitor.Wait(cmd, ec)
+	status, err := Monitor.Wait(cmd, ec)
+	if err == nil && status != 0 {
+		err = fmt.Errorf("%s did not terminate sucessfully", cmd.Args[0])
+	}
 	return err
 }