ENYO-2883: use build `excludes` for non-minified apps

…this complements the application manifest `deploy.json` used only for
minified apps.

https://enyojs.atlassian.net/browse/ENYO-2883

Tested: OSX/ChromeCanary, OSX/Firefox, Node.js 0.10.16, Node.js 0.8.25.

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>