[libsigcplusplus/libsigc++-2-10] Update tests/.gitignore

[Murray Cumming <murrayc src gnome org>]

commit b70393f2db4f0d43d176a200ecc7e474ec51cb6e
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Apr 20 11:46:44 2016 +0200

    Update tests/.gitignore

 tests/.gitignore |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/tests/.gitignore b/tests/.gitignore
index be803fc..6816751 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -31,3 +31,5 @@
 /test_trackable_move
 /test_track_obj
 /test_visit_each
+/test_visit_each_trackable
+/benchmark