[kde-base/kinfocenter] Add live ebuild for KF5 based kinfocenter

Known issues:
- CMakeLists.txt provided by upstream doesn't allow to explicitely disable
  the optional RAW1394 and PCIUTILS modules, so they might cause automagic
  dependencies
- kinfocenter starts, but doesn't list any modules at all

Package-Manager: portage-2.2.10