title: XCode 'Run Script' step to create directory and copy file is failing
body: <p>I have the following custom script step during my build:</p>
  
  <p>mkdir -p "${CONTENTS_FOLDER_PATH}/Frameworks"
  cp "${SRCROOT}/testing.1.dylib" "${CONTENTS_FOLDER_PATH}/Frameworks"</p>
  
  <p>The script runs successfully, but when I check the bundle the Frameworks directory does not exist.</p>
  
  <p>Should not not work as I expect? (Frameworks folder created with the testing.1.dylib in it).</p>
  
  <p>Edit: Added screenshot of the runscript.
  <img src="https://i.stack.imgur.com/Lekis.png" alt="RunScript"></p>