[mutter] (3 commits) Non-fast-forward update to branch fix-key-repeat

[Ray Strode <halfline src gnome org>]

The branch 'fix-key-repeat' 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:

  b68bf37... backends/x11: Fix key repeat of on-screen keyboard for seco

Commits added to the branch:

  a0a612f... meson: Add 'Build Configuration' section (*)
  867db93... clutter/text: Invalidate actor paint volume when it has cha (*)
  5a32fd9... backends/x11: Fix key repeat of on-screen keyboard for seco

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