gnu: enlightenment: Update to 0.24.0.

* gnu/packages/enlightenment.scm (enlightenment): Update to 0.24.0.
[arguments]: Change configure-flags to hardcode efl binary locations.
Remove custom 'fix-dot-desktop-creation phase. Update 'set-system-actions
phase.
* gnu/packages/patches/enlightenment-fix-setuid-path.patch: Update for
new upstream version.
* gnu/services/desktop.scm (enlightenment-setuid-programs): Same.