meson: Add meson build for test

This commit is to add meson build for test.
and later, we will remove autotools and replace it with meson.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: Ia36cec4eda7937461f62f43dd74907e82a164bf6
diff --git a/meson_options.txt b/meson_options.txt
index 8d5578a..3c8b28b 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,4 +1,10 @@
 option(
+    'tests', type : 'feature',
+    value: 'enabled',
+    description : 'Build tests'
+)
+
+option(
     'associations', type : 'feature',
     value: 'enabled',
     description : 'Enable creating D-Bus associations from a JSON definition'