The loading of the qml debugger was hardcoded to dynamically load its
plugins.
Now directly build and instantiate the QQmlDebugServerConnection in
static builds.

Done-with: Kai Koehne <kai.koehne@digia.com>
Change-Id: I38bf0e310caaa6aaa743e3814b0108c6fe7001df
Reviewed-by: Ulf Hermann <ulf.hermann@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>