[glib] (3 commits) Non-fast-forward update to branch wip/pwithnall/2625-clang-cxx

[Philip Withnall <pwithnall src gnome org>]

The branch 'wip/pwithnall/2625-clang-cxx' 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:

  16bcfb8... tests: Add C++ tests for typechecking with atomic compare a
  36127fa... gatomic: Add a C++ variant of g_atomic_int_compare_and_exch
  a063149... WIP

Commits added to the branch:

  4e65bcd... tests: Fix a typo in a test skip message
  16d1bc4... tests: Add C++ tests for typechecking with atomic compare a
  ad23894... gatomic: Add a C++ variant of g_atomic_int_compare_and_exch