[mutter] (4 commits) Non-fast-forward update to branch wip/lantw/gethostname

[Jonas Ådahl <jadahl src gnome org>]

The branch 'wip/lantw/gethostname' 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:

  799a10a... xwayland: Use g_get_host_name instead of gethostname
  7e14b12... window-x11: Fix _XOPEN_SOURCE usage for gethostname on Free
  81e6f64... display: Remove _XOPEN_SOURCE definition

Commits added to the branch:

  181c7ca... wayland: Use right sign for workspace ID (*)
  c35e561... xwayland: Use g_get_host_name instead of gethostname
  0185909... window-x11: Fix _XOPEN_SOURCE usage for gethostname on Free
  6055f04... display: Remove _XOPEN_SOURCE definition

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