[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:

  5b03a82... cogl/framebuffer: Check buffer bits before modifying it
  4945346... framebuffer: Fix clip tracking in the unclipped case
  c132fa6... cogl/journal: Track viewport
  ccc70fb... cogl/journal: Track dither
  567b048... cogl: Remove midscene tracking

Commits added to the branch:

  e82a657... clutter/actor: Remove color from the pick virtual function (*)
  5d646a5... cogl/framebuffer: Check buffer bits before modifying it
  d57dbe1... framebuffer: Fix clip tracking in the unclipped case
  0556138... cogl/journal: Track viewport
  c5b7d73... cogl/journal: Track dither
  6207283... cogl: Remove midscene tracking

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