This disallows fancy varyings in tessellation and geometry shaders,
as required by ES 3.2.
Fixes:
dEQP-GLES31.functional.tessellation.user_defined_io.negative.per_patch_array_of_structs
dEQP-GLES31.functional.tessellation.user_defined_io.negative.per_patch_structs_containing_arrays
(Not a candidate for stable branches as it only disallows things which
should be working as desktop GL allows them.)
v2: Update error messages to not say "vertex shader" (caught by Iago).
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
bc7f1eddbd