Improve afl_fuzz wrapper

[gnbon]

The current ql_afl_fuzz wrapper in Qiling supports setting exit addresses using the exits parameter. It sets the exit addresses at the start and calls the ql_afl_fuzz_custom wrapper with a dummy fuzz callback.

Although both ql_afl_fuzz and ql_afl_fuzz_custom wrappers have almost the same API, it is impossible to set exit addresses if ql_afl_fuzz_custom is called directly.

To address this issue, I passed the exits parameter seamlessly to ql_afl_fuzz_custom for both wrappers to support setting exit addresses.

Checklist

Which kind of PR do you create?

• This PR only contains minor fixes.
• This PR contains major feature update.
• This PR introduces a new function/api for Qiling Framework.

Coding convention?

• The new code conforms to Qiling Framework naming convention.
• The imports are arranged properly.
• Essential comments are added.
• The reference of the new code is pointed out.

Extra tests?

• No extra tests are needed for this PR.
• I have added enough tests for this PR.
• Tests will be added after some discussion and review.

Changelog?

• This PR doesn't need to update Changelog.
• Changelog will be updated after some proper review.
• Changelog has been updated in my PR.

Target branch?

• The target branch is dev branch.

One last thing

• I have read the contribution guide

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[xwings]

@wtdcode can u take a look?

[wtdcode]

LGTM but I think you have to update samples.

[gnbon]

Thanks. I have tested some sample scripts in the examples/fuzzing/ directory to ensure that they run smoothly without modifications.

For the stm32f429 using the ql_afl_fuzz_custom function, I updated the necessary modifications to comply with the updated API.
For the linux_x8664 and qnx_arm using the ql_afl_fuzz function, I confirmed that they run seamlessly.

[gnbon]

@wtdcode are these commits ready to be merged?

[wtdcode]

Yes, LGTM now. Let's wait for CI.

[gnbon]

@xwings can u help review this request？

[xwings]

Thanks for the PR. Need to wait for one more approve before we are good to merge. @wtdcode