[Fixed Position] Add placeholder specs

Add placeholder specs for classes added to support
selection of elements in a fixed position view,
WTD-879.

platform/features/layout/test/FixedProxySpec.js

@@ -0,0 +1,12 @@
+/*global define,describe,it,expect,beforeEach,jasmine,xit*/
+
+define(
+    ['../src/FixedProxy'],
+    function (FixedProxy) {
+        "use strict";
+
+        describe("Fixed Position view's selection proxy", function () {
+
+        });
+    }
+);