[tracker] (4 commits) Non-fast-forward update to branch wip/carlosg/graphs

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/graphs' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  7268686... libtracker-sparql: Fix off-by-one error in TrackerNamespace
  771989e... libtracker-sparql: Allow shortened graph forms in TrackerRe
  8bdf2f3... libtracker-data: Don't assert on NULL subject

Commits added to the branch:

  dcfe6da... Merge branch 'wip/carlosg/split-dataobject-informationeleme (*)
  6fd0376... libtracker-sparql: Fix off-by-one error in TrackerNamespace
  48419a3... libtracker-sparql: Allow shortened graph forms in TrackerRe
  3bbeffa... libtracker-data: Don't assert on NULL subject

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