RFR: 8328999: Update GIFlib to 5.2.2

[Alexander Zvegintsev]

On Tue, 30 Apr 2024 18:46:51 GMT, Alisen Chung <achung at openjdk.org> wrote:

>> The GIFLIB version 5.2.2 adds the `ifndef` wrap, and it is no longer the "JDK modification", so it looks like our comment can be removed
>
> does this also apply for the other JDK modification for old compilers as well?

Regarding the `JDK modifications to support building using old compilers` from `gif_lib.h`:

I found my old [review request](https://mail.openjdk.org/pipermail/awt-dev/2015-April/009269.html), that mentioned [why](https://stackoverflow.com/questions/8548521/trying-to-use-include-stdbool-h-in-vs-2010/8549206) these changes were added (because of the issue with VS 2010).

However, this issue [should be fixed as of VS 2013](
https://devblogs.microsoft.com/cppblog/c99-library-support-in-visual-studio-2013/).

So you should probably check the build without these changes, and if it works fine, remove them.

The only concern is if some of the JDKs we are going to backport this upgrade use VS below 2013 (I am not sure if we have any), but I think we can bring our fix back to the specific backport.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18985#discussion_r1585548477