[cogl] (6 commits) Non-fast-forward update to branch wip/quadbuffer-stereo

[Owen Taylor <otaylor src gnome org>]

The branch 'wip/quadbuffer-stereo' 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:

  7256c99... Add support for setting up stereo CoglOnscreens
  8716cf3... Add a simple example of stereo drawing
  d0c2e43... CoglTexturePixmapX11: add support for stereo content
  2850e07... examples/cogl-x11-tfp: Add a --gears option to run glxgears
  157cc90... examples/cogl-texture-pixmap-x11: Add a --stereo command li

Commits added to the branch:

  157c1a0... examples/cogl-x11-tfp: Fix compilation (*)
  1507716... Add support for setting up stereo CoglOnscreens
  51575cf... Add a simple example of stereo drawing
  d0cd1a8... CoglTexturePixmapX11: add support for stereo content
  105ae54... examples/cogl-x11-tfp: Add a --gears option to run glxgears
  b15caed... examples/cogl-texture-pixmap-x11: Add a --stereo command li

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