[retro-gtk] (2 commits) Non-fast-forward update to branch header-fixes

[Adrien Plazas <aplazas src gnome org>]

The branch 'header-fixes' 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:

  62df0f8... ci: Check that private headers remain private
  d31cb32... ci: Split the lint on multiple lines
  ed828c3... ci: Split the lint on multiple lines
  4e2b11e... ci: Split the lint on multiple lines

Commits added to the branch:

  0157a0f... ci: Check that private headers remain private
  9d5698c... ci: Check that retro-gtk.h contains public headers