title: Build failure when trying to build SSCrypto framework for use with iOS
body: <p>Using Xcode 4, I'm attempting to build the SSCrypto framework for use with an iOS app.  </p>
  
  <p>In Build Settings, when I change the base SDK to Latest iOS, I get this error:</p>
  
  <pre><code>target specifies product type 'com.apple.product-type.framework', but there's no such product type for the 'iphoneos' platform
  </code></pre>
  
  <p>My googling and searching has turned up empty, so I feel I'm missing something obvious...</p>
  
  <p>How do I get SSCrypto framework to work on iOS?</p>