[skia] add feature rtti

[omartijn]

This is necessary on UNIX platforms when using the skia library in an application built with rtti itself.

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version.
• Any fixed CI baseline entries are removed from that file.
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• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

[dg0yt]

Is this really a feature or a triplet setting?

[omartijn]

Is this really a feature or a triplet setting?

I think having this as a triplet setting is quite a nice idea, and I support that as an idea.

However, we already have other ports that have this as a feature, e.g. llvm, glslang, bullet3, mesa, halide`. For consistency, I'd argue we merge it like this for now.

If we turn this into a triplet-feature we also need to ensure it's properly supported for all ports, which I think is quite a bit of work, so I think that deserves it's own PR.

[dg0yt]

At least I'm surprised to see EXTRA_CXX_CFLAGS getting quick "approval", despite the usual "follow CMake toolchain settings". Add did you check that there isn't some explicit gn config stuff? Does the flag depend on actual compiler?

[dg0yt]

Is this specific to clang, llvm/llvm-project#66117?