[gtk] (6 commits) Non-fast-forward update to branch modern-testsuite

[Benjamin Otte <otte src gnome org>]

The branch 'modern-testsuite' 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:

  9c1606e... tests: Update rendernode test to use textures
  27d0f3a... testsuite: Port compare_render() to use textures
  83829c5... reftests: Use 0.6 alpha, not 0.5
  ae81ab5... reftests: Use 0.6 instead of 0.5 for alpha
  7761567... reftests: Use the GL renderer
  8a349ea... xxx
  36a02ef... reftests: Make image-compre use textures

Commits added to the branch:

  70c1e08... tests: Update rendernode test to use textures
  5fa40f2... testsuite: Port compare_render() to use textures
  b174c05... reftests: Use 0.6 alpha, not 0.5
  487e6c9... reftests: Use 0.6 instead of 0.5 for alpha
  62b982a... reftests: Make image-compare use textures
  e95e814... reftests: Use the default (aka NGL) renderer