[libsigcplusplus] tests: Add missing copyright headers.

[Murray Cumming <murrayc src gnome org>]

commit ce1e8a954efc38e5c37f769b3b725505488c250b
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Apr 20 08:39:52 2016 +0200

    tests: Add missing copyright headers.

 tests/test_accum_iter.cc        |    4 ++++
 tests/test_bind_ref.cc          |    4 ++++
 tests/test_copy_invalid_slot.cc |    4 ++++
 tests/test_custom.cc            |    4 ++++
 tests/test_limit_reference.cc   |    4 ++++
 5 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/tests/test_accum_iter.cc b/tests/test_accum_iter.cc
index 9a00e39..81ada50 100644
--- a/tests/test_accum_iter.cc
+++ b/tests/test_accum_iter.cc
@@ -1,3 +1,7 @@
+/* Copyright 2007 - 2016, The libsigc++ Development Team
+ *  Assigned to public domain.  Use as you wish without restriction.
+ */
+
 #include "testutilities.h"
 #include <sigc++/sigc++.h>
 #include <sstream>
diff --git a/tests/test_bind_ref.cc b/tests/test_bind_ref.cc
index 2e709f4..a83fbae 100644
--- a/tests/test_bind_ref.cc
+++ b/tests/test_bind_ref.cc
@@ -1,3 +1,7 @@
+/* Copyright 2005 - 2016, The libsigc++ Development Team
+ *  Assigned to public domain.  Use as you wish without restriction.
+ */
+
 #include "testutilities.h"
 #include <sigc++/sigc++.h>
 #include <sstream>
diff --git a/tests/test_copy_invalid_slot.cc b/tests/test_copy_invalid_slot.cc
index 5af9121..307445b 100644
--- a/tests/test_copy_invalid_slot.cc
+++ b/tests/test_copy_invalid_slot.cc
@@ -1,3 +1,7 @@
+/* Copyright 2005 - 2016, The libsigc++ Development Team
+ *  Assigned to public domain.  Use as you wish without restriction.
+ */
+
 #include "testutilities.h"
 #include <sstream>
 #include <cstdlib>
diff --git a/tests/test_custom.cc b/tests/test_custom.cc
index a32e83c..48002ff 100644
--- a/tests/test_custom.cc
+++ b/tests/test_custom.cc
@@ -1,3 +1,7 @@
+/* Copyright 2005 - 2016, The libsigc++ Development Team
+ *  Assigned to public domain.  Use as you wish without restriction.
+ */
+
 // Write your custom tests here so you don't have to think about how to compile
 // and execute your test code against the exact same library that you are
 // currently hacking.
diff --git a/tests/test_limit_reference.cc b/tests/test_limit_reference.cc
index 5102497..5031263 100644
--- a/tests/test_limit_reference.cc
+++ b/tests/test_limit_reference.cc
@@ -1,3 +1,7 @@
+/* Copyright 2005 - 2016, The libsigc++ Development Team
+ *  Assigned to public domain.  Use as you wish without restriction.
+ */
+
 #include "testutilities.h"
 #include <sigc++/sigc++.h>
 #include <sstream>