Updated io-sim, changed way users select simulator device type

I updated ios-sim (see corresponding commits on ios-sim master) and along with it the way by which one selects the simulator device type. ios-sim switched to device type ids and deprecated the old --sdk flag.

I removed the `ios-sim-family` and `ios-sim-sdk` flags and replaced them with two new flags `printdevicetypes` and `devicetype`. The former will print (shorthand) device type ids consisting of 

* the device name, e.g. "iPhone-5"
* the sdk version, e.g. "8.0"

A valid device type may look like "iPhone-5, 8.0" which can be passed as the value for the `devicetype` flag.

I tested this from within Eclipse as well as on the CLI with ROBOVM_DEV_ROOT and by packaging a distribution and working with the CLI tools and without ROBOVM_DEV_ROOT.

There is a corresponding PR on the https://github.com/robovm/robovm-eclipse project that exposes this new way of selecting within the Eclipse plugin.