Convert notify parameter inside gerrit_util

Bug: skia:6744
Change-Id: I0f84bd685bfacf692190f8636208122cf88d0b82
Reviewed-on: https://chromium-review.googlesource.com/529016
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Aaron Gable <agable@chromium.org>
diff --git a/gerrit_util.py b/gerrit_util.py
index 6045de7..f2020be 100755
--- a/gerrit_util.py
+++ b/gerrit_util.py
@@ -732,7 +732,7 @@
   if labels:
     body['labels'] = labels
   if notify:
-    body['notify'] = notify
+    body['notify'] = 'ALL' if notify else 'NONE'
   conn = CreateHttpConn(host, path, reqtype='POST', body=body)
   response = ReadHttpJsonResponse(conn)
   if labels: