Fix the library generation so that each library ends up in the lib/ directory of the module they belong to

So for example, QtSvg.dll would end up in qtsvg/lib, not qtkernel/lib as it currently does.

This is the "right" way to do it, but may cause trouble for example on Windows, because it requires the lib path to be in the PATH environment to find it, and with this approach there will be one for each module.