[retro-gtk] (14 commits) ...flatpak: Add many more unit tests

[Adrien Plazas <aplazas src gnome org>]

Summary of changes:

  9817f12... reftest: Make failures non-fatal (*)
  db28ac3... reftest: Merge references generation into tests (*)
  b6779d7... reftest: Rename RetroReftest into RetroReftestData (*)
  c152ce1... reftest: Make RetroReftestData ref-counted (*)
  a39e66c... reftest: Add retro_reftest_setup_for_commandline_args() (*)
  1a01750... reftest: Add RetroReftestVideo (*)
  07505c4... reftest: Add /run test (*)
  df2a856... reftest: Add /boot test (*)
  12295a5... reftest: Add RetroReftestFile
  e0fbcb1... reftest: Add retro_reftest_setup_for_file()
  ebb9e8d... reftest: Take test files rather than options
  c39420c... reftest: Drop unused retro_reftest_setup_for_commandline_ar
  76b1287... flatpak: Update test data
  7f9d6a7... flatpak: Add many more unit tests

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