improve evas packaging.

improve evas packaging.

 - don't package directfb, it's for specific systems like embedded
   where it is required to build manually, maybe define some tweaks.

 - don't build with no-dither-mask as it will completely disable
   dithering on 16 and 8bpps, that's wrong! This is supposed to be
   enabled on embedded devices only, like maemo.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/evas@40518 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33