fix MacOs client product packaging

The tar transformation also transforms symbolic links - for relative symbolic
links to parent folders (../*) the previous transformation resulted in broken
links.
In that concrete case the symbolic link inside the JRE was broken.

refs #628

Change-Id: Ie299443fe3526f95b1c57206ab7519ec3b4d84fc
Reviewed-on: http://gerrit.esdi-community.eu/3137
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>