Link samples static; allows to execute the samples without installing
the library or setting LD_LIBRARY_PATH
Update Makefile
Merge branch 'static_samples' of https://github.com/TobiasSimon/nmealib

* 'static_samples' of https://github.com/TobiasSimon/nmealib:
  Update Makefile
  Link samples static; allows to execute the samples without installing the library or setting LD_LIBRARY_PATH