move platform-specific images to their respective platform

tools/make-firefox.sh

@@ -20,6 +20,7 @@ mv $DES/img/icon_128.png $DES/icon.png
 cp platform/firefox/vapi-*.js $DES/js/
 cp platform/firefox/bootstrap.js $DES/
 cp platform/firefox/frame*.js $DES/
+cp -R platform/firefox/img $DES/
 cp platform/firefox/chrome.manifest $DES/
 cp platform/firefox/install.rdf $DES/
 cp platform/firefox/*.xul $DES/