gpsd: backport upstream patches pending 3.11 release

The 3.11 release of gpsd is imminent; in the meantime, backport some patches
from upstream to fix some of the autobuild failures.

Also bump to the most recent Git snapshot.

Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>