Fix PackageFile for object storage [ci skip]

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

ee/app/models/packages/package_file.rb

@@ -7,4 +7,12 @@ class Packages::PackageFile < ActiveRecord::Base
   validates :file_name, presence: true
 
   mount_uploader :file, Packages::PackageFileUploader
+
+  after_save :update_file_store, if: :file_changed?
+
+  def update_file_store
+    # The file.object_store is set during `uploader.store!`
+    # which happens after object is inserted/updated
+    self.update_column(:file_store, file.object_store)
+  end
 end