[gnome-builder] (8 commits) ...build: bump libgit2-glib dependency

[Christian Hergert <chergert src gnome org>]

Summary of changes:

  85dc2ab... context: do not rely on Vcs to discover project files (*)
  0840178... project-item: set parent property when appending child (*)
  9767c4f... project-files: add ide_project_files_add_file() (*)
  e7a1f1d... project: add add_file() and get_files() helpers (*)
  f839897... project-tree: update project tree after adding file or dire (*)
  0e86e6c... git: track updated libgit2-glib patches (*)
  e7dd1f0... project: add transfer annotation
  b3f940c... build: bump libgit2-glib dependency

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