[gtk] (4 commits) Non-fast-forward update to branch matthiasc/color-profiles

[Matthias Clasen <matthiasc src gnome org>]

The branch 'matthiasc/color-profiles' 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:

  da3e439... ngl: Apply gamma to frames
  4fd497e... ngl: Linearize colors too
  c2af5d9... Linearize gl textures

Commits added to the branch:

  d45ab3f... ngl: Apply gamma to frames (*)
  1be2d6f... ngl: Linearize colors too (*)
  256308a... Linearize gl textures (*)
  b8b62c6... ngl: Use stem darkening for glyphs

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