The qtpaths tool is supposed to replace "qmake -query", and it must be
available for cross-builds as a wrapper script like qmake.
Re-use the existing facility for creating the qmake wrapper script for
creating the qtpaths wrapper script.
Pick-to: 6.2
Fixes: QTBUG-97821
Change-Id: I460bae61a531994422e1c0fba09c79e4aa65713f
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
