title: set_metadata_recursive failing on Android install
body: <p>I'm trying to bring up a 4.4 android build for my droid razr HD. It compiles cleanly, but when I try to install it fails with the following error in the recovery log:</p>
  
  <pre><code>    ApplyParsedPerms: removexattr of /system/xbin/zipalign to 0 failed: Operation not supported on transport endpoint      
  script aborted: set_metadata_recursive: some changes failed                                                            
  set_metadata_recursive: some changes failed                                                                            
  E:Error executing updater binary in zip '/external_sd/MSI/update-XenonHD-11-07-13-signed-xt926.zip'                    
  Error flashing zip '/external_sd/MSI/update-XenonHD-11-07-13-signed-xt926.zip' 
  </code></pre>
  
  <p>So... I did a fair amount of research into the changes made by AOSP in build and bootable/recovery, including comments others have made on this issue, and I'm thinking it's a missing seandroid configuration for /system/xbin. It's definitely something about items in /system/xbin because when I remove zipalign from the build, it errors out on tcpdump, and so on..
  Is this indeed a sepolicy configuration that's missing? Is there something else I need to check? 
  Can anyone tell me how to include xbin without having to mess with the files residing there?
  Thanks, appreciate your time! </p>