title: xcode 4 fails to initiate unit tests (with linker error) after I created a new scheme
body: <p>My unit tests worked fine in xcode4 until I had to create a new schema to compile a package to run on my device for testing. </p>
  
  <p>All I did was creating  a new Target and a new Scheme, now I try to run the unit tests and get the following error: </p>
  
  <p><strong>The test bundle at [...]Tests.octest could not be loaded because a link error occurred.  It is likely that dyld cannot locate a framework framework or library that the the test bundle was linked against, possibly because the framework or library had an incorrect install path at link time.</strong></p>
  
  <p>What did I break?</p>