Update desktop-skin recipe

Update desktop-skin recipe

* New revision.
* Add post istall script.
* Revert erronous update of desktop-skin recipe.

This recipe update corrects issue BTY-6 that was introduced with the
last desktop-skin recipe update (commit
4b8829828a9eaa019101e05ec3bb97000b12a0bf). That update was made from a
wrongly generated recipe which was due to desktop-skin being missing in
the whitelist of the recipe generatop (spec2yocto).

This commit also partially corrects issue BTY-7 since it brings back
missing configuration files needded to start the tz-launchers.

Bug-Tizen: BTY-6
Bug-Tizen: BTY-7
Change-Id: I78f4d4d300f6761235bb32f4db96115a5678bf65
Signed-off-by: Kévin THIERRY <kevin.thierry@open.eurogiciel.org>