title: RoR Passenger webserver "Extra File" errors on gem check --alien
body: <p>I just installed the Phusion Passenger webserver via gem install. I then did a <code>gem check --alien</code> and got this error message:</p>
  
  <pre><code>fastthread-1.0.7 has 3 problems
    .require_paths:
      Extra file
    ext/fastthread/Makefile:
      Extra file
    lib/fastthread.rb:
      Extra file
  
  passenger-2.2.15 has 5 problems
    .require_paths:
      Extra file
    ext/phusion_passenger/Makefile:
      Extra file
    ext/phusion_passenger/native_support.o:
      Extra file
    ext/phusion_passenger/native_support.so:
      Extra file
    lib/native_support.so:
      Extra file
  </code></pre>
  
  <p>googled it up to no avail...any fixes for this?</p>