[gexiv2] (12 commits) Non-fast-forward update to branch wip/0.12

[Jens Georg <jensgeorg src gnome org>]

The branch 'wip/0.12' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  a79ecbd... Remove autotools
  38c2bbe... Post-release version bump
  112c5ee... Require exiv2 >= 0.26
  657a8db... Bump soversion
  364b9ed... Update meson docs
  2bbaab5... Do not use linker script on darwin

Commits added to the branch:

  670b3e1... Do not use linker script on darwin (*)
  80174b3... metadata: Fallback to ApertureValue if FNumber is absent or (*)
  7507b01... doc: Add description of fallback to get_fnumber (*)
  611cff0... test: Add regression test for 792239 (*)
  f51cb19... metadata: Fix typos in documentation (*)
  d4b55f2... Fix GIR header and Vala .vapi completeness in Meson
  93961c7... Remove autotools
  495e546... Post-release version bump
  1b60661... Require exiv2 >= 0.26
  c99471e... Bump soversion
  a793ccc... Update meson docs
  d7b74ef... Remove VAPI override and meta-data

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