Add materialistic to run_on_app_dump

Contents of README.google:

Name: Materialistic for Hacker News
URL: https://github.com/christofferqa/materialistic
Version: NA
Revision: 2b2b2ee25ce9e672d5aab1dc90a354af1522b1d9
Date: Dec 13, 2018
License: Apache License 2.0

https://github.com/hidroh/materialistic

Bug: 152155164
Change-Id: Ieec08a68bd13116a903f60d3b6d516bda44b0f8b
diff --git a/.gitignore b/.gitignore
index 2e15bca..f35cac9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -140,6 +140,8 @@
 third_party/opensource-apps/iosched.tar.gz
 third_party/opensource-apps/kiss
 third_party/opensource-apps/kiss.tar.gz
+third_party/opensource-apps/materialistic
+third_party/opensource-apps/materialistic.tar.gz
 third_party/opensource-apps/sunflower
 third_party/opensource-apps/sunflower.tar.gz
 third_party/opensource-apps/wikipedia