Revision 394642

astro/gpsbabel: add GUI option, clean up dependencies

- Add GUI option (requires qt4-gui,qt4-xml,qt4-network and qt4-webkit at runtime).
- Remove autoconf/pcre/glib20/gettext dependencies (unused).
- USE_QT4=linguist_build -> USE_QT4=linguisttools_build (GUI option only).
- Use system zlib.
- Regenerate patch.

PR:                  201680
Submitted by:        s3erios@gmail.com
Approved by:         dev2@heesakkers.info