[gtk] (12 commits) ...Merge branch 'ebassi/memdup2' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  965e74f... Add compatibility shim for g_memdup2() (*)
  504b5bb... broadway: Move from g_memdup() to g_memdup2() (*)
  435d126... macos: Move from g_memdup() to g_memdup2() (*)
  3a3e029... wayland: Move from g_memdup() to g_memdup2() (*)
  cf3f742... x11: Move from g_memdup() to g_memdup2() (*)
  386d832... gdk: Move from g_memdup() to g_memdup2() (*)
  a9c6162... gsk: Move from g_memdup() to g_memdup2() (*)
  78e3908... gtk: Move from g_memdup() to g_memdup2() (*)
  43fd9d1... win32: Move from g_memdup() to g_memdup2() (*)
  a63a2b2... Ensure we don't overflow when using g_memdup2() (*)
  b74a944... tests: Move from g_memdup() to g_memdup2() (*)
  4df7cc9... Merge branch 'ebassi/memdup2' into 'master'

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