query the presence of the right module
query the presence of the right module

the existence of a -private module does not imply the presence of a
public module any more, so we need to test for qmldevtools-private
explicitly.

Change-Id: Ibd691d758bcaf9c07280bd560521f4947be98f06
Reviewed-by: Friedemann Kleint <1b9f2592239daaec4856ccc1cfb4d2d55b35fb71@digia.com>
Reviewed-by: Joerg Bornemann <47777b9406dbddd02a3fdca8341789a013805a11@digia.com>

mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools