[mutter] (6 commits) Non-fast-forward update to branch gbsneto/software-picking

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

The branch 'gbsneto/software-picking' 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:

  606665b... cluter/stage: Use clear4f() variant when picking
  496ad05... clutter/stage: Remove clip hack
  856889c... cogl/framebuffer: Check buffer bits before modifying it
  c5f7fc2... clutter/stage: Stop toggling dither on pick()
  3144ea0... clutter/stage-cogl: Remove unused variable
  f72c2ec... framebuffer: Fix clip tracking in the unclipped case

Commits added to the branch:

  c98fbe5... cluter/stage: Use clear4f() variant when picking
  c61fa6a... clutter/stage: Remove clip hack
  c33cb68... cogl/framebuffer: Check buffer bits before modifying it
  adb6c6f... clutter/stage: Stop toggling dither on pick()
  fa39b37... clutter/stage-cogl: Remove unused variable
  4eddd5e... framebuffer: Fix clip tracking in the unclipped case