Add another core_array_equality to eurydice_glue.h

[franziskuskiefer]

Add another core_array_equality function.

[msprotz]

Cool, confirm that a1 and a2 are arrays, not slices? From the name it looks like the arguments may be slices.

[franziskuskiefer]

Ha good catch. It's indeed a slice. I'll update later.

[msprotz]

That's better, but t* is not going to work if t is a non-scalar type, e.g. the "pointerized" version of int[2] is (int*)[2], not int[2]*.

Do you need that cast here? If so, we need custom support for this in code-gen (which I'm happy to implement).