[gtk] (9 commits) Non-fast-forward update to branch texture-upload-bgra

[Matthias Clasen <matthiasc src gnome org>]

The branch 'texture-upload-bgra' 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:

  3312a74... gl: Use GL_EXT_texture_format_BGRA8888

Commits added to the branch:

  3d88175... gl: Make debug spew more complete (*)
  6cdbf1a... popup: Fix up a doc blurb (*)
  d6912a6... More texture upload fixes (*)
  fe8986f... Merge branch 'matthiasc/for-master' into 'master' (*)
  54944c9... Merge branch 'fix-texture-upload-more' into 'master' (*)
  ae09e20... NEWS: Updates (*)
  d56ad7c... Add a test for various texture uploads (*)
  34ec226... Merge branch 'matthiasc/for-master' into 'master' (*)
  8bae908... gl: Use GL_EXT_texture_format_BGRA8888

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