Don't require an active X session to run qhelpgenerator
Don't require an active X session to run qhelpgenerator

qhelpgenerator now uses QGuiApplication which means it needs an active
X session to run unless we pass -platform minimal.

Change-Id: I411f8817e9082843ac054fc9838aea2df6290c1e
Reviewed-on: http://codereview.qt-project.org/5823
Reviewed-by: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Rohan McGovern <d75463945f40a9669160a73cef2843e56b22c602@nokia.com>
Reviewed-by: Jiang Jiang <594d7d250b9ab2285e8b7bb5d68542d53c50c753@nokia.com>

kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc