[gtk] (7 commits) Non-fast-forward update to branch matthiasc/for-master-2

[Matthias Clasen <matthiasc src gnome org>]

The branch 'matthiasc/for-master-2' 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:

  2379278... gdk: Silence some compiler warnings
  a1f4fbd... frameclock: cosmetics
  c0282ab... icontheme: Remove some dead code
  f66f62f... Add a lib64 variant of gtk.supp
  c503c8c... widget: Fix a memory leak with class actions
  5541894... icontheme: Fix various memory leaks
  d812122... emojichooser: Add profiler marks for loading

Commits added to the branch:

  9e6ae7a... gdk: Silence some compiler warnings
  9a446f2... frameclock: cosmetics
  1cb575a... icontheme: Remove some dead code
  b996b85... Add a lib64 variant of gtk.supp
  fac435b... widget: Fix a memory leak with class actions
  25c25ba... icontheme: Fix various memory leaks
  54f6515... emojichooser: Add profiler marks for loading