[ostree] Update .gitignore

[Jasper St. Pierre <jstpierre src gnome org>]

commit 8e8bfa8708514134f7535219beeb0eaf55c5b767
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Wed Aug 26 12:16:29 2015 -0700

    Update .gitignore

 tests/.gitignore |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tests/.gitignore b/tests/.gitignore
index 91cccb2..afa0b23 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -11,3 +11,4 @@ test-mutable-tree
 test-ot-opt-utils
 test-ot-tool-util
 test-ot-unix-utils
+test-rollsum-cli