D29034: Add systemd user service file for kded

[Kai Uwe Broulik]

broulik planned changes to this revision.

REPOSITORY
  R297 KDED

REVISION DETAIL
  https://phabricator.kde.org/D29034

To: broulik, #plasma, #frameworks
Cc: davidedmundson, kde-frameworks-devel, LeGast00n, cblack, michaelh, ngraham, 
bruns