devel/kronosnet: update 1.25 to 1.26

• https://github.com/kronosnet/kronosnet/compare/v1.25...v1.26
  
  nozzle: tests: Fix 'set_down' test on FreeBSD-devel
  
  The new FreeBSD adds a LOWER_UP flag to interfaces that indicates whether the driver is signalling L1 up. So we need to exclude that from our grep when checking the higher-level interface status.