8295685: Update Libpng to 1.6.38

[GoeLin]

I backport this for parity with 17.0.7-oracle.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8295685: Update Libpng to 1.6.38

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev pull/1097/head:pull/1097
$ git checkout pull/1097

Update a local copy of the PR:
$ git checkout pull/1097
$ git pull https://git.openjdk.org/jdk17u-dev pull/1097/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1097

View PR using the GUI difftool:
$ git pr show -t 1097

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/1097.diff

[bridgekeeper]

👋 Welcome back goetz! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

@GoeLin This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8295685: Update Libpng to 1.6.38

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[mlbridge]

Webrevs

• 00: Full (c32235a1)

[GoeLin]

/integrate

[openjdk]

Going to push as commit 62ccb39.
Since your change was applied there have been 4 commits pushed to the master branch:

• ba023c6: 8297264: C2: Cast node is not processed again in CCP and keeps a wrong too narrow type which is later replaced by top
• 40b5f15: 8287180: Update IANA Language Subtag Registry to Version 2022-08-08
• eac9a05: 8292033: Move jdk.X509Certificate event logic to JCA layer
• 0056a63: 8286705: GCC 12 reports use-after-free potential bugs

Your commit was automatically rebased without conflicts.

[openjdk]

@GoeLin Pushed as commit 62ccb39.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.