[fix] allow lot of queries in update comments patch

patches/1311/p04_update_comments.py

@@ -3,6 +3,8 @@
 
 def execute():
 	import webnotes
+	webnotes.conn.auto_commit_on_many_writes = True
 	for name in webnotes.conn.sql_list("""select name from tabComment"""):
 		webnotes.get_obj("Comment", name).update_comment_in_doc()
-	
+	webnotes.conn.auto_commit_on_many_writes = False
+