[BUGFIX] Add dependencies to the example extensions

Change-Id: Ie86df26a653e6491c7c077716e4cd99a40c254b0
Reviewed-on: http://review.typo3.org/32381
Reviewed-by: Carsten Biebricher <cb@hdnet.de>
Tested-by: Carsten Biebricher <cb@hdnet.de>