st/nine: Properly initialize GLSL types for NIR shaders.

NIR shaders use GLSL types (note: these live outside libglsl), and
nine needs to properly initialize these just like the other state
trackers. This fixes an assertion failure when TTN is used.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
22 jobs for !1909 with nine-glsl-types-19.2 in 26 minutes and 26 seconds (queued for 1 minute and 41 seconds)
merge request