ristretto: upgrade 0.12.1 -> 0.12.2

Release notes for 0.12.2
========================
- New Features:
  - Thumbnailer: Add support for shared thumbnail repositories (openembedded#82)
  - Thumbnailer: Add thumbnail flavor support (openembedded#81)
- Performance Improvement:
  - Optimization: Use TreeModel IFace to walk the image list
  - Optimization: Add index and list link to RsttoImageListIter
  - Optimization: Switch to GQueue in RsttoImageList
- Code Refactoring:
  - Flatpak: Add lifecycle manager patch to Xfconf dependency
  - Flatpak: Add Tumbler dependency as a private service (!35)
  - Flatpak: Add pixbuf loaders
  - Refactoring: Cleanup and simplifications around thumbnail size
  - Redistribute thumbnail sizes uniformly
  - Disable debug checks in release mode
  - Cleanup: Miscellaneous
  - Cleanup: Remove unused APIs in RsttoImageList
- Bug Fixes:
  - Fix and complete file change monitoring
  - Thumbnailer: Rework queue management
  - Thumbnailer: Properly set the number of visible items
  - Take the device scale into account to limit rendering quality
  - Avoid multi-threading issue with X11 (openembedded#76)
- Translation Updates

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

meta-xfce/recipes-apps/ristretto/ristretto_0.12.1.bb → meta-xfce/recipes-apps/ristretto/ristretto_0.12.2.bb

@@ -10,6 +10,6 @@ inherit xfce-app mime-xdg
 
 RRECOMMENDS:${PN} += "tumbler"
 
-SRC_URI[sha256sum] = "13853f9ca18466a8e4788e92c7bde3388a93e8340283568f5dee1a9396ffd7ee"
+SRC_URI[sha256sum] = "0eee869922ec00a253dafa446c2aad2a2f98e07e1db7262e8337ce9ec2dad969"
 
 FILES:${PN} += "${datadir}/metainfo"