Fix leaks in test/correctness/memoize.cpp #7705
Merged
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This was a little tricky, because it turns out any custom allocator used with memoized allocations needs to be compatible with the vanilla halide_free, because that's what's going to get called when the runtime shuts down.
Edit: The above issue is now resolved by just digging out the malloc/free from the runtime and wrapping them. Making a compatible one just didn't work on windows, as the malloc that gets called from the test seems to be different to the malloc that is resolved by the JIT-compiled runtime.
Built on #7700