Fix QT_DECLARATIVE dependency for Qt 4.6
Fix QT_DECLARATIVE dependency for Qt 4.6

rdebroiz/dtk,rdebroiz/dtk,d-tk/dtk,NicolasSchnitzler/dtk,NicolasSchnitzler/dtk,d-tk/dtk,NicolasSchnitzler/dtk,d-tk/dtk,NicolasSchnitzler/dtk,d-tk/dtk,d-tk/dtk,rdebroiz/dtk,d-tk/dtk,rdebroiz/dtk