[clang-tools-extra] Add new tool: clang-read-diagnostics (PR #118522)

[Jon Roelofs via cfe-commits]

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@@ -0,0 +1,10 @@
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/..)
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jroelofs wrote:

I'm not sure this is necessary.

https://github.com/llvm/llvm-project/pull/118522