RFR: 8328999: Update GIFlib to 5.2.2

[Alisen Chung]

On Wed, 1 May 2024 16:40:21 GMT, Phil Race <prr at openjdk.org> wrote:

> So it sounds like the JDK mods are no longer needed, at least for current mainline compilers, and I assume you verified that all those formatting changes are from upstream, not your IDE ?
> 
> If yes, approved, but it needs a 2nd reviewer approval still.

I verified the formatting changes are from upstream

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PR Comment: https://git.openjdk.org/jdk/pull/18985#issuecomment-2088922934