[libsigcplusplus] .gitignore: update test ignored files list

[Murray Cumming <murrayc src gnome org>]

commit 07d003a8b57b7df01f1736cc107e586008a33c96
Author: Marcin Kolny <marcin kolny gmail com>
Date:   Fri Mar 11 22:56:38 2016 +0100

    .gitignore: update test ignored files list

 tests/.gitignore |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/tests/.gitignore b/tests/.gitignore
index ff35316..d59cabc 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -3,6 +3,7 @@
 /test_accumulated
 /test_accum_iter
 /test_bind
+/test_bind_as_slot
 /test_bind_ref
 /test_bind_refptr
 /test_bind_return
@@ -18,6 +19,7 @@
 /test_hide
 /test_limit_reference
 /test_mem_fun
+/test_member_method_trait
 /test_ptr_fun
 /test_retype
 /test_retype_return
@@ -33,5 +35,7 @@
 /test_tuple_cat
 /test_tuple_cdr
 /test_tuple_end
+/test_tuple_for_each
 /test_tuple_start
+/test_tuple_transform_each
 /test_visit_each