[clang] [Clang] [Parser] Support [[omp::assume]] (PR #84582)

[via cfe-commits]

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@@ -192,6 +192,8 @@ Removed Compiler Flags
 Attribute Changes in Clang
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+- Added support for the `[[omp::assume]]` attribute.
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Sirraide wrote:

> This should probably go under an OpenMP-specific section as it relates more to OpenMP than anything else.

Should I add an omp-specific section to the Clang release notes? Because there doesn’t seem to be one, and the OpenMP release notes in the `openmp` directory are specifically meant for changes to the runtime—at least according to a comment there.

https://github.com/llvm/llvm-project/pull/84582