[llvm] [SPIRV] Addition of extension SPV_KHR_non_semantic_info and SPV_KHR_relaxed_extended_instruction (PR #169643)

[Viktoria Maximova via llvm-commits]

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@@ -251,7 +251,8 @@ Below is a list of supported SPIR-V extensions, sorted alphabetically by their e
      - Add instructions for fixed point arithmetic. The extension works without SPV_ALTERA_arbitrary_precision_integers, but together they allow greater flexibility in representing arbitrary precision data types.
    * - ``SPV_EXT_image_raw10_raw12``
      - Adds Image Channel Data Type definitions for RAW10 and RAW12 image formats.
-
+   * - `` SPV_KHR_relaxed_extended_instruction``
+     - Adds the ability to have forward declaration in some specific non-semantic instructions.
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vmaksimo wrote:

Please also add the description about `SPV_KHR_non_semantic_info` 

https://github.com/llvm/llvm-project/pull/169643