ignore /var cache files

Change-Id: I29999b0e8150f12c4738106ceb92a46c62c54d03
diff --git a/.gitignore b/.gitignore
index 539da74..b049bd4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 *.py[co]
+
+/var/