build: Add build system

Change-Id: I073a9213d13c50451be5938e4e15c4a41a1166aa
diff --git a/tests/wscript b/tests/wscript
new file mode 100644
index 0000000..383ae8c
--- /dev/null
+++ b/tests/wscript
@@ -0,0 +1,15 @@
+# -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
+
+from waflib import Utils
+
+top = '..'
+
+def build(bld):
+    if bld.env['WITH_TESTS']:
+        unit_tests = bld.program(
+            target='../unit-tests',
+            features='cxx cxxprogram',
+            source=bld.path.ant_glob(['**/*.cpp']),
+            use='ndns-objects',
+            install_path=None,
+          )