[CORD-772] Example UI Extension update for platform install

Change-Id: I673869b28401d9c5321320ed2b69a282578d0e9f
diff --git a/xos-sample-gui-extension.yaml b/xos-sample-gui-extension.yaml
new file mode 100644
index 0000000..2dcb037
--- /dev/null
+++ b/xos-sample-gui-extension.yaml
@@ -0,0 +1,15 @@
+tosca_definitions_version: tosca_simple_yaml_1_0
+
+description: Persiste xos-sample-gui-extension
+
+imports:
+   - custom_types/xos.yaml
+
+topology_template:
+  node_templates:
+
+    # UI Extension
+    xos-sample-gui-extension:
+      type: tosca.nodes.XOSGuiExtension
+      properties:
+        files: /spa/extensions/xos-sample-gui-extension/vendor.js, /spa/extensions/xos-sample-gui-extension/app.js