fix a bug for Xcode 7 in where it doesn't return simulator device name
fix a bug for Xcode 7 in where it doesn't return simulator device name

beni55/RubyMotion,HipByte/RubyMotion,incbee/RubyMotion,HipByte/RubyMotion,beni55/RubyMotion,katsuyoshi/RubyMotion,katsuyoshi/RubyMotion,beni55/RubyMotion,katsuyoshi/RubyMotion,hboon/RubyMotion,incbee/RubyMotion,HipByte/RubyMotion,hboon/RubyMotion,katsuyoshi/RubyMotion,incbee/RubyMotion,incbee/RubyMotion,hboon/RubyMotion,beni55/RubyMotion