Use the same prebuilt pacakges for all platforms since the prebuilt libs
are going to be used for the target and they are not tied to the host.
Pick-to: 6.6 6.5
Task-number: QTBUG-110025
Change-Id: I2c79722989902b16883b31cbc6e140855239fcc8
Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>