[#433] support IOX2_CLANG_ARG for build.rs

[xieyuschen]

Notes for Reviewer

I'm stuck in my laptop because I cannot install clang easily. But it could be fixed by specifying the header by clang_arg. So I have raised this PR to tackle with it.

Pre-Review Checklist for the PR Author

1. [X] Add sensible notes for the reviewer
2. [X] PR title is short, expressive and meaningful
3. [X] Relevant issues are linked in the References section
4. [X] Every source code file has a copyright header with SPDX-License-Identifier: Apache-2.0 OR MIT
5. [X] Branch follows the naming format (iox2-123-introduce-posix-ipc-example)
6. [X] Commits messages are according to this guideline
   • [X] Commit messages have the issue ID ([#123] Add posix ipc example)
   • [X] Commit author matches Eclipse Contributor Agreement (and ECA is signed)
7. [X] Tests follow the best practice for testing
8. [X] Changelog updated in the unreleased section including API breaking changes
9. [ ] Assign PR to reviewer
10. [X] All checks have passed (except task-list-completed)

Checklist for the PR Reviewer

• [ ] Commits are properly organized and messages are according to the guideline
• [ ] Unit tests have been written for new behavior
• [ ] Public API is documented
• [ ] PR title describes the changes

Post-review Checklist for the PR Author

1. [ ] All open points are addressed and tracked via issues

References

Updates #443.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.93%. Comparing base (6f05b7b) to head (70a2332). Report is 55 commits behind head on main.

Additional details and impacted files

[](https://app.codecov.io/gh/eclipse-iceoryx/iceoryx2/pull/449?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=eclipse-iceoryx) ```diff @@ Coverage Diff @@ ## main #449 +/- ## ========================================== - Coverage 78.97% 78.93% -0.04% ========================================== Files 195 196 +1 Lines 22836 23283 +447 ========================================== + Hits 18034 18379 +345 - Misses 4802 4904 +102 ``` [see 21 files with indirect coverage changes](https://app.codecov.io/gh/eclipse-iceoryx/iceoryx2/pull/449/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=eclipse-iceoryx)

[xieyuschen]

Cc: @elfenpiff

[xieyuschen]

close as it could be solved by export BINDGEN_EXTRA_CLANG_ARGS.