gnu: efl: Update to 1.18.0.

* gnu/packages/enlightenment.scm (efl): Update to 1.18.0.
[inputs]: Add ghostscript, libraw, libspectre, openjpeg, poppler.
[arguments]: Remove unecessary 'patch-config-files phase, add phase
hardlinking the location of pulseaudio and libsndfile.
* gnu/packages/enlightenment.scm (terminology, enlightenment, rage)
(python-efl)[inputs]: Remove elementary, now provided by efl.