[CTFXG 2514716] MXML-G compilation cannot deal with BitmapImage with URL as the embedded source

FXGUtils has no problem compiling a BitmapImage with an URL for a source to SWF.

But MXML-G fails to do so with the error:

network resource http://architel.com/wp-content/images/opensource.jpg cannot be embedded at compile time; please use a local file or load the resource at runtime