SPIR-V has a concept of a function type that's used fairly heavily. We could special-case function types in SPIR-V -> NIR but it's easier if we just add support to glsl_types. Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com> Acked-by: Matt Turner <mattst88@gmail.com> Acked-by: Jose Fonseca <jfonseca@vmware.com>