gllin outputs uncompressed NMEA log, crashes on disk full

[mjr@…]

The gllin as packaged seems to output uncompressed NMEA log into
/home/root/gllin/log (in addition to the gzipped log that's started in the
wrapper script, apparently because gllin would crash if there was no reader).
This fills up the internal flash in relatively short order as well as does extra
writes that we don't need on the flash. Also, the crash that results from not
being able to write said log is rather uninformative.

Fortunately, this one is mostly a matter of a command line parameter; gllin
should be given -nmea in the latter startup command in the wrapper script.
(gllin -h claims this is the default, but that seems to be inaccurate.)

(Personally, I just replaced the cat as well with a pipe to /dev/null, but
that's me.)

[mickey]

Fixed meanwhile with a newer package.