D5417: add an extractor using qtmultimedia

[David Faure]

dfaure accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R286 KFileMetaData

BRANCH
  qtmultimedia

REVISION DETAIL
  https://phabricator.kde.org/D5417

To: mgallien, #frameworks, dfaure
Cc: dfaure, #frameworks