[gtk] 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:

  ff1b0a2... wip: Do texture conversions in shaders

Commits added to the branch:

  6635be6... ngl: Do texture conversions in shaders