build: add meson for unit-tests

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I96e75ba8a4853d0454f3f5012e0d79e1a34af02c
diff --git a/meson_options.txt b/meson_options.txt
index 5b73cce..70c130e 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,4 +1,10 @@
 option(
+    'tests',
+    type: 'feature',
+    value: 'enabled',
+    description: 'Build tests',
+)
+option(
     'google_oen',
     type: 'feature',
     value: 'enabled',