feat(dom_renderer): add setBindingDebugInfo method

This is used for setting property binding values as attributes
on elements when running in dev mode. This implementation will
also serialize binding information to template placeholder
comment nodes.

Closes #5227

modules/angular2/src/core/render/api.ts

@@ -300,6 +300,9 @@ export abstract class Renderer {
   abstract setElementAttribute(location: RenderElementRef, attributeName: string,
                                attributeValue: string);
 
+  abstract setBindingDebugInfo(location: RenderElementRef, propertyName: string,
+                               propertyValue: string);
+
   /**
    * Sets a (CSS) class on the Element specified via `location`.
    *