emacs: fix X11DEPENDS and build without x11 enabled at all

* also added copy for libcroco
  librsvg is linked to it by default after
  http://git.openembedded.org/openembedded-core/commit/?id=e177f1475c55c7d0bf3e2752e6502a7e8577a075



Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>