Add simple-calendar to run_on_app_dump

Contents of README.google:
Name: Simple Calendar
URL: https://github.com/SimpleMobileTools/Simple-Calendar
Version: NA
Revision: 906209874d0a091c7fce5a57972472f272d6b068
Date: Nov 7, 2020
License: GNU General Public License v3.0

Bug: 152155164
Change-Id: Ie5844d260ad64d3563c5c3218e8456d3de1e83e8
diff --git a/.gitignore b/.gitignore
index a537cdd..f7f7671 100644
--- a/.gitignore
+++ b/.gitignore
@@ -154,6 +154,8 @@
 third_party/opensource-apps/santa-tracker.tar.gz
 third_party/opensource-apps/signal-android
 third_party/opensource-apps/signal-android.tar.gz
+third_party/opensource-apps/simple-calendar
+third_party/opensource-apps/simple-calendar.tar.gz
 third_party/opensource-apps/sunflower
 third_party/opensource-apps/sunflower.tar.gz
 third_party/opensource-apps/wikipedia