mesa: Additional SSO validation using program_interface_query data

mesa: Additional SSO validation using program_interface_query data

Fixes the following dEQP tests on SKL:

dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_qualifier_vertex_smooth_fragment_flat
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_implicit_explicit_location_1
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_array_element_type
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_qualifier_vertex_flat_fragment_none
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_struct_member_order
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_struct_member_type
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_qualifier_vertex_centroid_fragment_flat
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_array_length
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_type
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_struct_member_precision
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_explicit_location_type
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_qualifier_vertex_flat_fragment_centroid
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_explicit_location
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_qualifier_vertex_flat_fragment_smooth
dEQP-GLES31.functional.separate_shader.validation.varying.mismatch_struct_member_name

It regresses one test:

dEQP-GLES31.functional.separate_shader.validation.varying.match_different_struct_names

Hoever, this test is based on language in the OpenGL ES 3.1 spec that I
believe is incorrect.  I have already submitted a spec bug:

https://www.khronos.org/bugzilla/show_bug.cgi?id=1500

v2: Move spec quote about built-in variables to the first place where
it's relevant.  Suggested by Alejandro.

v3: Move patch earlier in series, fix rebase issues.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com> [v2]
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com> [v2]