ActiveQt: create DLL-versions as well.

t4id: 261581

Because the ActiveQt-libs are static rather than DLLs, we see potential problems for our application. We have a multi-DLL application and currently two DLLs linking to ActiveQt libraries. Since this means that both DLLs have not only their own private implementations of the ActiveQt classes and functions (which means bloat but should be harmless enough) but in particular their global variables (which can be a major issue). For this reason it would be good if you could create DLL-versions of the ActiveQt module as well.