Preload OpenSSL DLLs on Windows.
Preload OpenSSL DLLs on Windows.

Add code to _setupQtDirectories that will preload the OpenSSL DLLs if
they are included in the PySide package.  It uses a trick of temporarily
modifying the PATH so Qt's QSystemLibrary will be able to find them.

Change-Id: I67b56642ef74444f19806b52c6a1080dc6d92996
Reviewed-by: John Ehresman <e6d25d56bf914a903f20fb85792c1479e3ed29d6@wingware.com>

RobinD42/pyside,gbaty/pyside2,RobinD42/pyside,PySide/PySide,BadSingleton/pyside2,gbaty/pyside2,pankajp/pyside,qtproject/pyside-pyside,IronManMark20/pyside2,IronManMark20/pyside2,BadSingleton/pyside2,qtproject/pyside-pyside,IronManMark20/pyside2,RobinD42/pyside,pankajp/pyside,gbaty/pyside2,qtproject/pyside-pyside,pankajp/pyside,enthought/pyside,pankajp/pyside,PySide/PySide,enthought/pyside,BadSingleton/pyside2,PySide/PySide,enthought/pyside,IronManMark20/pyside2,RobinD42/pyside,enthought/pyside,PySide/PySide,gbaty/pyside2,gbaty/pyside2,pankajp/pyside,RobinD42/pyside,enthought/pyside,qtproject/pyside-pyside,PySide/PySide,enthought/pyside,IronManMark20/pyside2,qtproject/pyside-pyside,enthought/pyside,BadSingleton/pyside2,RobinD42/pyside,BadSingleton/pyside2,RobinD42/pyside