Bug#534254: gosmore: build dep on libgps-dev

[Hamish]

Hi,

gosmore should build-dep on libgps-dev, but first apparently needs to be
updated from the libgps19 api to libgps20 api.

If libgps-dev is installed on the system, gosmore will not BFS. You need
to edit Makefile and Makefile.in to remove the test for it so it doesn't
try to build with the libgps19 api, and fail because libgps20's gps.h is
found.


Hamish