[TIMOB-17293]Xcode 6 support

Testing instruction

build iOS-sim

1. Old things should work the way as they used(i.e Xcode 5.1.1 and below)
 * path/to/ios-sim launch <path/to/build/application.app> --sdk 7.1 --family iPhone

2. With new Xcode Find all sims.
*  path/to/ios-sim showallsimulators
list of all simulators

3. With New Xcode 

* path/to/ios-sim launch <path/to/build/application.app> --udid <UDIDOFTHESIMULATOR>