angstrom-kde-desktop-image: Update to allow more testing
angstrom-kde-desktop-image: Update to allow more testing

* Added udisks-systemd
* Added task-kde-apps
* Added virtual/plasma-startscript

Signed-off-by: Samuel Stirtzel <5e7b27e76d616174d4c71d96463fdd2f7e57e559@googlemail.com>

Angstrom-distribution/meta-kde,koenkooi/meta-kde4,Angstrom-distribution/meta-kde,koenkooi/meta-kde4