Qnx: Activate/Deactivate auto detected configurations

Add activate and deactivate actions to only create kits
for used NDK targets and not for all installed ones.

Users may want to switch between different targets
without uninstalling non active taregts.

Change-Id: Ie023ebdedbf3494bb7f1c251ce5f7fadec9f9206
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Tobias Nätterlund <tobias.naetterlund@kdab.com>
Reviewed-by: David Kaspar <dkaspar@blackberry.com>