[gtk+] (12 commits) Non-fast-forward update to branch wip/otte/shader

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/shader' 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:

  70d2ec7... gskslvariable: Allow storing an initializer value with a va
  e9649bd... gskslprogram: Allow variables to have constant initializers
  86a090c... gskslexpression: References to const variables are const
  73667f9... gsksltype: Add gsk_sl_type_get_index_stride()
  ed92598... gskslexpression: Parse swizzles
  521e475... gskslpreprocessor: Redo error emission
  78f56f1... gsksl: Add an error enum
  a084917... gskslpreprocessor: Return fatalness of parsing
  337cb46... gsksl: Make expression parsing never fail
  2860a8f... gskslnode: Always return a statement
  f0e6963... gskslscope: Track function calls
  a73c954... gskslexpression: Implment function calls

Commits added to the branch:

  e1bbfa8... gskslvariable: Allow storing an initializer value with a va
  45c6423... gskslprogram: Allow variables to have constant initializers
  6e2fa90... gskslexpression: References to const variables are const
  f6fbfe9... gsksltype: Add gsk_sl_type_get_index_stride()
  62ed009... gskslexpression: Parse swizzles
  3ffdbb6... gskslpreprocessor: Redo error emission
  ad45598... gsksl: Add an error enum
  5ed4f11... gskslpreprocessor: Return fatalness of parsing
  eab2a62... gsksl: Make expression parsing never fail
  d840e59... gskslnode: Always return a statement
  2f18137... gskslscope: Track function calls
  2b9946b... gskslexpression: Implment function calls