Static builds: Link QML plugins.

Run qmlimportscanner, add found plugins to the LIBS
line, generate qml_plugin_import.cpp.

Change-Id: I6c6b927cceb36fa2dc405ad698f26d20398b33c8
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
iOS: Mark argument as unused for release builds

Change-Id: I73497a6c16236f912646c9fbe9b136ff760ce4f7
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
Refresh Windows printer list when QPrinterInfo.availablePrinters() is called.

Introduce static query functions.

Task-number: QTBUG-33666
Change-Id: I291098c9da82bc2cc24957044187e93cdc33c41d
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>