Mageia 4 changes to /proc/net/fib_triestat recreator

The contents of /proc/net/fib_triestat on Mageia 4 (and possibly
Slackware as well) don't include all the lines that are found on
the OS'es where this package was developed.  So the recreator for
that files needed to conditionally include the optional data when
writing it's output.