Add the option argument INSTALL_VERSIONED_LINK to qt_internal_add_tool
and qt_internal_add_app. For tools/apps with this argument we create an
install rule that creates a versioned hard link. For example, for
bin/qmake we create bin/qmake6.
Note that this only applies to prefix builds.
Apply this argument to qmake.
The qt_internal_add_app change is necessary for qtdiag and in qttools.
Task-number: QTBUG-89170
Change-Id: Id32d6055544c475166f4d854aaeb6292fbb5fbb5
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
(cherry picked from commit c19d957f45fa27f61b5ecc566f8dbc19f12a44c3)
9f444ce533