Do not add reference to QMenu in QToolButton::setMenu()
Do not add reference to QMenu in QToolButton::setMenu()

QToolButton::setMenu() states that "Ownership of the menu is not transferred
to the tool button.", so, do not add reference.

Task-number: PYSIDE-340
Change-Id: I3139c9990dbd3b099ef4ded08569bdeb35aeb43c
Reviewed-by: Alexandru Croitor <8ffcaf561685ad82d027def0dc95a2702daba6ec@qt.io>

qtproject/pyside-pyside,qtproject/pyside-pyside,qtproject/pyside-pyside,qtproject/pyside-pyside,qtproject/pyside-pyside