[gdk-pixbuf] (5 commits) Non-fast-forward update to branch ebassi/for-master

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'ebassi/for-master' 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:

  0b26bf3... build: Use more idiomatic Meson
  15b678d... build: Handle -Dbuiltin_loaders=none
  03a4cae... Build PNG and JPEG loaders into gdk-pixbuf by default
  5c5ec21... build: Change the default for builtin_loaders

Commits added to the branch:

  949a9b9... build: Use more idiomatic Meson
  117cc8b... build: Handle -Dbuiltin_loaders=none
  a6175b6... Build PNG and JPEG loaders into gdk-pixbuf by default
  6e8a9c6... build: Change the default for builtin_loaders
  866670e... build: Port post-install script to Python