PostUploadHook needs to return something

NoTry: true
Bug: skia:
Change-Id: I46bf81f2221e5d8e50fdde7fb9a20bf53c760ac2
Reviewed-on: https://skia-review.googlesource.com/82121
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 3499246..a5cc808 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -475,7 +475,7 @@
     # due to PostUploadHooks) invalidates the CQ+2 vote from the
     # "--use-commit-queue" flag to "git cl upload".
     if cl.GetIssueOwner() in AUTO_COMMIT_BOTS:
-      return
+      return results
 
     original_description_lines, footers = cl.GetDescriptionFooters()
     new_description_lines = list(original_description_lines)