So you are compiling using XCode 5 on 10.9, right?
You have two options:
1) From an older version of XCode, copy across the 10.7 SDK, which is what the sample projects expect (since Premiere Pro CC runs on Mac OS 10.7 and later)
2) In the Build Settings, change the Base SDK to OS X 10.8. This means the plug-ins you build will not work on 10.7.