[pango] (4 commits) Non-fast-forward update to branch serializer2

[Matthias Clasen <matthiasc src gnome org>]

The branch 'serializer2' 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:

  57781a4... Add layout serialization api
  4ceeca3... Make test-layout use layout serialization

Commits added to the branch:

  2c0f7e3... Neuter g_debug in line-breaking (*)
  9730027... Merge branch 'take-out-gdebug' into 'main' (*)
  38239f4... Add layout serialization api
  07f71d0... Make test-layout use layout serialization

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