mesa: validate shader binary format in _mesa_spirv_shader_binary

Rework:
 * Jordan: Added ARB_gl_spirv text to comment.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23155>
1 file changed