Update GIFlib from version 5.2.2 to version 6.1.1. Clientlibs test is green on all platforms.
------------- Commit messages: - Fix whitespace across all - Update whitespace and fix removals - Minor change - Initial commit Changes: https://git.openjdk.org/jdk/pull/30119/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=30119&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8379256 Stats: 1914 lines in 9 files changed: 438 ins; 409 del; 1067 mod Patch: https://git.openjdk.org/jdk/pull/30119.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/30119/head:pull/30119 PR: https://git.openjdk.org/jdk/pull/30119
