fix setting the output directory for the qmake evaluator
fix setting the output directory for the qmake evaluator

not so wise to use the project file instead of its parent directory ...

amends f51f7b7b95

Change-Id: I35b18f81a86d097b82b8184669b0231810c66f73
Reviewed-by: hjk <f81b91af79013637d070c18d38a75b90eaae8ba3@nokiamail.com>
Reviewed-by: Oswald Buddenhagen <6a8868beda3e139b5ac22b2534a23d3e6ba81819@digia.com>

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