[mutter] (20 commits) ...tests: Move clutter-test-utils.[ch] to src/tests

[Jonas Ådahl <jadahl src gnome org>]

Summary of changes:

  a32559e... clutter: Remove "has_xinput" x11 API (*)
  f304fa4... Drop xinput2 version checks (*)
  829d9c8... clutter: Move scattered x11 keymap code into ClutterKeymapX (*)
  54101b1... clutter: Use G_DECLARE_DERIVABLE_TYPE for ClutterDeviceMana (*)
  e56df45... clutter: Drop ClutterEventTranslator interface (*)
  f54bf02... clutter: Remove ClutterEventExtender interface (*)
  2ca3513... clutter/cally: Remove needless per-backend code in cally (*)
  d6aaef9... clutter: Drop _() define (*)
  ef93bb6... clutter: Remove event retrieval toggle (*)
  5e343e2... clutter: Remove support for foreign stages (*)
  fa4580d... clutter: Temporarily comment out clutter tests (*)
  ad72fa4... clutter: Move X11 input to src/backends/x11 (*)
  96d5bde... backends: Don't use glib types in new X11 backend objects (*)
  c710a56... backends: Move nested stage to src/backends/x11/nested (*)
  cb31e3e... clutter: Drop unused function to translate to screen coordi (*)
  ea54ce7... clutter: Drop functions to get XVisualInfo (*)
  8b03d9e... clutter: Move evdev input to src/backends/native (*)
  c0a7172... backends: Don't use glib types in new native backend object (*)
  cfb8f18... clutter: Move tests to src/tests (*)
  cc7e843... tests: Move clutter-test-utils.[ch] to src/tests (*)

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