[tracker] (8 commits) ...Merge branch 'wip/carlosg/bus-statements' into 'master'

[Sam Thursfield <sthursfield src gnome org>]

Summary of changes:

  412a5fe... libtracker-sparql: Refactor code writing cursor to a fd (*)
  5992367... libtracker-sparql: Add "arguments" parameter to Query endpo (*)
  c34aa24... libtracker-sparql: Add missing call to intermediate vapi fi (*)
  81508cb... libtracker-bus: Implement TrackerSparqlStatement (*)
  90ad297... libtracker-data: Also add parameters as literals when trans (*)
  7581ee0... tests: Add incipient TrackerSparqlStatement tests (*)
  ed20413... libtracker-data: Fix race condition (*)
  63736da... Merge branch 'wip/carlosg/bus-statements' into 'master'

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