Fix dependency between CTK-Configure and CTK-build
Fix dependency between CTK-Configure and CTK-build

Because the dependency is between toplevel projects, it should be defined
with ADD_DEPENDENCIES instead of  ADD_CUSTOM_TARGET::DEPENDS which is
solely for file dependencies.
It was working fine for CMake >= 2.8.4 but failed for CMake 2.8.2

lassoan/CTK,msmolens/CTK,vovythevov/CTK,finetjul/CTK,mehrtash/CTK,finetjul/CTK,vovythevov/CTK,jcfr/CTK,CJGoch/CTK,fedorov/CTK,danielknorr/CTK,AndreasFetzer/CTK,fedorov/CTK,naucoin/CTK,Heather/CTK,CJGoch/CTK,danielknorr/CTK,vovythevov/CTK,SINTEFMedtek/CTK,CJGoch/CTK,naucoin/CTK,mehrtash/CTK,sankhesh/CTK,fedorov/CTK,Heather/CTK,pieper/CTK,Sardge/CTK,commontk/CTK,SINTEFMedtek/CTK,AndreasFetzer/CTK,jcfr/CTK,danielknorr/CTK,rkhlebnikov/CTK,espakm/CTK,ddao/CTK,laurennlam/CTK,151706061/CTK,lassoan/CTK,mehrtash/CTK,lassoan/CTK,rkhlebnikov/CTK,vovythevov/CTK,pieper/CTK,jcfr/CTK,sankhesh/CTK,CJGoch/CTK,ddao/CTK,151706061/CTK,Sardge/CTK,naucoin/CTK,AndreasFetzer/CTK,rkhlebnikov/CTK,151706061/CTK,ddao/CTK,Sardge/CTK,AndreasFetzer/CTK,151706061/CTK,espakm/CTK,lassoan/CTK,CJGoch/CTK,jcfr/CTK,SINTEFMedtek/CTK,sankhesh/CTK,naucoin/CTK,commontk/CTK,sankhesh/CTK,Sardge/CTK,151706061/CTK,commontk/CTK,finetjul/CTK,SINTEFMedtek/CTK,fedorov/CTK,laurennlam/CTK,rkhlebnikov/CTK,espakm/CTK,laurennlam/CTK,laurennlam/CTK,pieper/CTK,danielknorr/CTK,SINTEFMedtek/CTK,msmolens/CTK,jcfr/CTK,mehrtash/CTK,Heather/CTK,ddao/CTK,Heather/CTK,espakm/CTK,commontk/CTK,pieper/CTK,finetjul/CTK,msmolens/CTK,msmolens/CTK