pipes: Set fowners for both pipe ends

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

pipes.c

@@ -206,6 +206,9 @@ static int recv_pipe_fd(struct pipe_info *pi)
 	fd = open(path, pi->pe.flags);
 	close(tmp);
 
+	if (restore_fown(fd, &pi->pe.fown))
+		return -1;
+
 	return fd;
 }