tree 3cc62e11c8ba6173a5c14e4a568f387fa0564876
parent 6e71c38443c0bf9d8954c87bf69bb4e019f44f94
author godofredoc <godofredoc@google.com> 1694534884 -0700
committer GitHub <noreply@github.com> 1694534884 -0700
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CP: Libwebp build script updates needed for the roll to 1.3.1 (#764) (#770)

CP:
https://github.com/flutter/buildroot/commit/7154eae5b1e161b064996fcc70e8be85298b8574
CP: 9780f253156165c515962f5f0c56235d34617689

## Pre-launch Checklist

- [X] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [X] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [X] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [X] I signed the [CLA].
- [X] I listed at least one issue that this PR fixes in the description
above.
- [X] I updated/added relevant documentation (doc comments with `///`).
- [X] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [X] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#overview
[Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene
[test-exempt]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes
[Discord]: https://github.com/flutter/flutter/wiki/Chat

---------

Co-authored-by: Jason Simmons <jason-simmons@users.noreply.github.com>