title: Xcode: "iOS Deployment Target" not available in "Debug" configuration
body: <p>so - for an iPhone project in Xcode (version 3.2.4) the project settings offer settings for "Base SDK" as well as "iOS Deployment Target" - the later of which determines what's the lowest iOS version to be supported.</p>
  
  <p>however - this "iOS Deployment Target" option is shown to me only in the "Release" configuration. When I switch to "Debug" this option disappears and minimum iOS version required seems to be automatically set to the same as Base SDK.</p>
  
  <p>The problem is that my iPhone runs on iOS 3.1.2 (and I want it to stay on this version!) - but the recent Xcode versions don't have Base SDK options for these older versions (lowest available Base SDK is 3.2) - so I need the "iOS Deployment Target" option to make it compatible with my phone.</p>
  
  <p>how can I make this option available in Debug Configuration?</p>