Updating giflib which is used in Splashscreen implementation to latest 6.1.3 version. CI testing is green.
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - 8384902: Update GIFlib to 6.1.3 Changes: https://git.openjdk.org/jdk/pull/31277/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31277&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8384902 Stats: 13 lines in 4 files changed: 8 ins; 0 del; 5 mod Patch: https://git.openjdk.org/jdk/pull/31277.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31277/head:pull/31277 PR: https://git.openjdk.org/jdk/pull/31277
