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: I79c72ca9c508bb5a807d078537bc135af836acdb
diff --git a/meson.build b/meson.build
index 4005e39..73ca4a6 100644
--- a/meson.build
+++ b/meson.build
@@ -95,3 +95,7 @@
     subdir: '.',
 )
 
+build_tests = get_option('tests')
+if not build_tests.disabled()
+  subdir('test')
+endif