Doc: Update .qdocconf to match example folder structure

Update the .qdocconf files for both Qt Location and Positioning
documentation sets to match the new example folder structure.

Also add 'examplesinstallpath' configuration value, needed for
correct paths in example manifest files.

Task-number: QTBUG-34907
Change-Id: I6115377044418b251757a18524de4fcf02502fa5
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Fix qdoc references following shift of example dirs

Task-number: QTBUG-34907
Change-Id: Id119523528c7cd2419be638048f4faf7bf0f2cb9
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Fix install path for examples

The QtLocation examples are still broken when running make install
but the module is not part of the release anyway.

Task-number: QTBUG-34907
Change-Id: Ie3a35daae3df39747a70ed4bce430ec1a73cbe3d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>