am 2f78b8ba: am 8fead691: Merge change 22448 into donut

Merge commit '2f78b8ba1225a92305ce6c03ef2898055b6a99ac'

* commit '2f78b8ba1225a92305ce6c03ef2898055b6a99ac':
  incremental OTAs should remove /system/recovery.img

tools/releasetools/ota_from_target_files

@@ -626,7 +626,8 @@ def WriteIncrementalOTAPackage(target_zip, source_zip, output_zip):
   script.Print("Removing unneeded files...")
   script.DeleteFiles(["/"+i[0] for i in verbatim_targets] +
                      ["/"+i for i in sorted(source_data)
-                            if i not in target_data])
+                            if i not in target_data] +
+                     ["/system/recovery.img"])
 
   if updating_boot:
     # Produce the boot image by applying a patch to the current