[gnome-builder] Created tag 3.26.4

[Christian Hergert <chergert src gnome org>]

The signed tag '3.26.4' was created.

Tagger: Christian Hergert <chergert redhat com>
Date: 1517441023 -0800

    release 3.26.4

Changes since the last tag '3.26.3':

Christian Hergert (25):
      buffer: backport helper to get highlight engine
      highlight-engine: backport weak ref usage fixes
      project-tree: handle future ABI break in libdazzle
      clang: plug GFile/IdeFile leak
      rustup: avoid modifying preferences after unloading
      vala-pack: avoid copying unsaved files from threads
      meson: use 'meson introspect'
      gitmodules: update path for libdazzle
      code-index: always store a copy of cursors
      gdbwire: backport gdbwire GNUC attributes from master
      gdb: silence gdbwire warnings
      sourceview:sourceview: cleanup ref_sink usage
      sourceview: fix deprecated keymap usage
      backport fixes for object assignment type safety
      python-pack: backport fixes for deprecated keymap usage
      backport more type assignment fixes for newer GObject
      buildsystem: backport type assignment fix
      flatpak: pass --command to flatpak build-finish
      config-manager: backport safety fixes
      terminal: fix block selection
      configuration: fix invalid chain-up in load_finish
      buildconfig: fix get_postbuild()
      git: backport fix to plug leak of DiffTask structure
      libdazzle: bump subproject for 3.26.3
      release 3.26.4

Cédric Valmary (1):
      Update Occitan translation

Sebastien Lafargue (1):
      xml-pack: prevent for analysing null size files