Add /core/store/data into .gitignore

Change-Id: Ia045f2ac490e180e8eed2d1e890116b5f46cddee
diff --git a/.gitignore b/.gitignore
index 7dc379f..243bb4d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,4 +17,5 @@
 
 core/store/trivial/data/
 core/store/apps
+core/store/data
 /bin/