ios: preliminary support for ios

first work in progress support for ios
* separate iosTool using xml communication used for device info and run
* iossim tool to handle the simulator
* debug prepared but not working
* separate gcc toolchain detection fix for simulator

1) add a QT built for ios
2) open a project, for example qtbase/examples/widgets/animation/animatedtiles/animatedtiles.pro
3) build/run...

Change-Id: I7e01604e416338cbe4692dfb34f5d3f31312702d
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
PathChooser - fix handling of predefined path

predefined path was not set when path chooser was set to select files.

Change-Id: I2a9b3d9f2d84b0c5f048bde8e098c6c17772e957
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>