Added 8.0 to available iOS sdks. Fixed iPhoneSimulator SDK paths finder mechanism.

In Xcode 6 beta 6+ there was added new folder in `Platforms/iPhoneSimulator.platform/Developer/SDKs/`  `iPhoneSimulator.sdk` which contains latest available iPhone Simulator SDK. But also there is `iPhoneSimulator<latest iOS version>.sdk`. Thereby script could ignore `iPhoneSimulator.sdk` to fix exception (it is supposed that path contains sdk version) and to not lose any information (required folder still exists).