[glib] (11 commits) Non-fast-forward update to branch gobject-speedups4

[Matthias Clasen <matthiasc src gnome org>]

The branch 'gobject-speedups4' 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:

  e1b0409... Keep a separate flag for notify handlers
  c641cbb... Avoid property notification during object construction
  48fce3b... Avoid property notification during g_object_set
  03a2f02... gobject: Speed up property lookup
  0c2621d... Make n_specs a gsize
  948186c... Consistently use param_spec_follow_override

Commits added to the branch:

  8b328f1... Keep a separate flag for notify handlers (*)
  8851112... Avoid property notification during object construction (*)
  f755f44... Avoid property notification during g_object_set (*)
  c11e64e... garray: Fix NULL-termination of GPtrArray copies (*)
  d0b0f8f... garray: Rename an internal helper to make its behaviour cle (*)
  12dc714... Merge branch 'gobject-speedup11' into 'main' (*)
  a6f208a... Merge branch 'array-copy-null-terminated' into 'main' (*)
  fa4e346... gatomic: Add APIs to perform atomic int / pointer exchanges (*)
  d7c3b0f... Merge branch 'gatomic-exchange' into 'main' (*)
  79d7d3e... gobject: Speed up property lookup
  69c34c2... Consistently use param_spec_follow_override

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