they are not included by default in the image. please have a look at the release notes for last release : http://builds.96boards.org/releases/dragonboard410c/linaro/debian/16.09/, and search for “Using the onboard GPS”
i recommend that you remove the hack you did by taking files from an older ubuntu image, first.
Also note that all the packages have been updated for 4.9 kernel now, so if you follow the instructions, it should just work. The last thing missing is an updated firmware where both audio and GPS coexist, so that we don’t need to manually start the DSP… this is not available yet, and this is why you need to start the DSP manually with qdsp-start script.