This script will install gnuwin32 to the windows machines so it can be
removed from qt5
Task-number: QTBUG-73422
Change-Id: I40b7963efcf047525626fe6f1e3ba50b54d68199
Reviewed-by: Juha Karjalainen <juha.karjalainen@qt.io>
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>