Adding to .git ignore for chronos-umbrella

Change-Id: Icacd545abe05fe4c56c8c6a161d41b0a6cdc9066
diff --git a/.gitignore b/.gitignore
index 2fe24a0..a15b3a2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 aether-roc-umbrella/Chart.lock
 aether-roc-umbrella/charts
+chronos-umbrella/Chart.lock
+chronos-umbrella/charts