[tumbler/f16] (5 commits) ...Fix thumbnail generation of the GStreamer plugin (#746110) Fix ownership race conditions when starte

[Christoph Wickert]

Summary of changes:

  77e65c6... Rebuild (poppler-0.18.0) (*)
  c816024... Fix URL (*)
  6594aff... Fix thumbnail generation of the GStreamer plugin (#746110)  (*)
  3655499... Actually add the new patches (*)
  39d2d0a... Fix thumbnail generation of the GStreamer plugin (#746110) 

(*) This commit already existed in another branch; no separate mail sent