meson: Add test meson build

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I38eba97894865909d793ed38330c47acb2f81a8e
diff --git a/src/meson.build b/src/meson.build
index 54e39f9..6a03a3e 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -59,3 +59,8 @@
     install: true,
     install_dir: get_option('bindir'),
 )
+
+build_tests = get_option('tests')
+if not build_tests.disabled()
+    subdir('test')
+endif