the primary method of doing that is via the -nomake tools machanism,
which is the default when cross-building.

amends 78df61b5

.

Fixes: QTBUG-70454
Change-Id: I837d5d130c1295154dab5d0424da46dacbfe2a34
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>