watchfrr: Convert `wtf` to a more meaningful message

watchfrr: Convert `wtf` to a more meaningful message

There is a fairly common state we are seeing where watchfrr
has decided that something is not right and is printing out
a `wtf` message.  At this point I am not sure what is going on
or how we are getting here, but let's add a bit more data dump
to the message so that we can figure out what is going on.

This is mainly being done because at this point in time I have no
clue the what/how of how we got here and I cannot reproduce.
Maybe by adding more useful information here I can figure out what is
going on.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com.