build: add basic meson config

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I0115a90b4f82c16cc15c4ce49cde3db084a39999
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..5b73cce
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1,6 @@
+option(
+    'google_oen',
+    type: 'feature',
+    value: 'enabled',
+    description: 'Enable the Google OEN handler',
+)