Exporting the full sqlite interface can lead to run-time conflicts with
the system sqlite that Qt's SQL support pulls in.
So re-build the sources for the unit test, as in the qmake build.
Change-Id: I8394b9c0aa4e21704bc84600f40b8f5d706ad66d
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
