[tracker] (11 commits) ...Merge branch 'wip/carlosg/graphs-through-with' into 'master'

[Sam Thursfield <sthursfield src gnome org>]

Summary of changes:

  b34bc3e... libtracker-data: Iterate through graphs directly in tracker (*)
  af60ab4... libtracker-data: Implement FTS match queries with WITH subq (*)
  8f51ca9... libtracker-data: Drop fts5 union views (*)
  ff0be80... libtracker-data: Handle union graph property/class queries  (*)
  590cbb2... libtracker-data: Drop union graph views for properties/clas (*)
  10c1af8... Revert "libtracker-data: Work around terrible query plannin (*)
  d760669... libtracker-data: Make inline union of all Refcount tables (*)
  c915e7f... libtracker-data: Drop union views entirely (*)
  ec4b446... build: Make "safe" sqlite checks fail hard (*)
  3900adf... build: Mark sqlite 3.24.0 >= $version >= 3.28.0 as broken (*)
  3f69aca... Merge branch 'wip/carlosg/graphs-through-with' into 'master

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