gpsd: fix autobuild failures

Add a gpsd patch sent upstream. Fixes, for example:

  http://autobuild.buildroot.net/results/c68/c68203cc9cf59db0b645d1b20ee7bed4670bbbf0/



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