Fix potential vulnerable cloned function

[npt-1707]

Description

I identified a potential vulnerability in clone functions in deflate.c and tree.c in abc/src/misc/zlib sourced from madler/zlib. This issue, originally reported in CVE-2018-25032, was resolved in the repository via this commit madler/zlib@5c44459.

Related Issue

None

Motivation and Context

My PR aims to bring a potential vulnerable clone function into your attention. I've applied the corresponding patch to fix the vulnerability in this codebase. Please review at your convenience.

How Has This Been Tested?

TODO: run test suite

Types of changes

• [x ] Bug fix (change which fixes an issue)
• New feature (change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

[AlexandreSinger]

Hi @npt-1707 , VTR is not the "home" repository of ABC. VTR copies ABC into it using a subtree, which makes the code look like it lives here.

Any changes to ABC should be made to the base ABC repository here: https://github.com/berkeley-abc/abc

I recommend you raise this PR on that repo.

After it is merged into master, if the change is needed on VTR, we can update the subtree of ABC on VTR to point to a more up to date version of ABC.

@vaughnbetz Correct me if anything I said above is incorrect.