don't reference $$QT_BUILD_TREE - it's unavailable here
don't reference $$QT_BUILD_TREE - it's unavailable here

Change-Id: I18b458ef20fe05dc1c131336f351ec021a4cdc63
Reviewed-by: Casper van Donderen <808524cef5c654648bea2a2b954f3b3445ed083c@nokia.com>

kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc