RFR: 8305527: HarfBuzz: Remove trailing comma from the enum in hb-paint.h

[Phil Race]

On Tue, 4 Apr 2023 15:46:36 GMT, Dmitry Markov <dmarkov at openjdk.org> wrote:

> Port the fix from the upstream/HarfBuzz repo.
> 
> More info can be obtained here:
> https://github.com/harfbuzz/harfbuzz/discussions/4188 
> https://github.com/harfbuzz/harfbuzz/commit/04a47932a3844f7e73e3af8b05fb98c8b54fb779

I don't see why we need this in mainline. I'd prefer to not have it unless we need it.

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Changes requested by prr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13328#pullrequestreview-1371479862