[gtk] (6 commits) Non-fast-forward update to branch glyphcache-fiddling

[Matthias Clasen <matthiasc src gnome org>]

The branch 'glyphcache-fiddling' 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:

  425e2b1... Various tweaks to the GL glyph cache

Commits added to the branch:

  b29feb1... gl: use memcmp to compare glyph cache keys (*)
  528297f... gl: avoid copying RenderOp to GArray (*)
  5b04201... Merge branch 'wip/chergert/avoid-renderop-copy' into 'maste (*)
  17c2479... Various tweaks to the GL glyph cache
  e1b1485... Cosmetics
  6ac8073... gsk: Store color bit info in text nodes

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