use centralized handling of QT_BUILD_PARTS
use centralized handling of QT_BUILD_PARTS

Change-Id: Ib689191802632e2f1ab3968c48d4a1fb72f18d5c
Reviewed-by: Rohan McGovern <d75463945f40a9669160a73cef2843e56b22c602@nokia.com>

kobolabs/qtlocation,amccarthy/qtlocation,amccarthy/qtlocation,kobolabs/qtlocation,kobolabs/qtlocation,amccarthy/qtlocation