Attach the svg renderer instead of providing it in order to fix VM tests

src/engine/runtime.js

@@ -917,6 +917,14 @@ class Runtime extends EventEmitter {
         this.renderer = renderer;
     }
 
+    /**
+     * Set the svg adapter, which converts scratch 2 svgs to scratch 3 svgs
+     * @param {!SvgRenderer} svgAdapter The adapter to attach
+     */
+    attachV2SVGAdapter (svgAdapter) {
+        this.v2SvgAdapter = svgAdapter;
+    }
+
     /**
      * Attach the storage module
      * @param {!ScratchStorage} storage The storage module to attach