Update the reviewnotes plugin to the latest revision

This adds the following commits:

- Fix note creation when the same commit exists in another Git repository.
- Fix committing the notes from the export command.

Change-Id: I7d679235da70ae0939e83ed11c0b2e8a753d8997
diff --git a/plugins/reviewnotes b/plugins/reviewnotes
index 99f869d..c01bc30 160000
--- a/plugins/reviewnotes
+++ b/plugins/reviewnotes
@@ -1 +1 @@
-Subproject commit 99f869d3f65cc0365eaecd75ec6305afd9541f7d
+Subproject commit c01bc30b654ee1666dc2820d219f74e6ecc7e03f