[clang] [llvm] [clang-format] Add new cmake target, `clang-format-style-options`, for updating ClangFormatStyleOptions.rst. (PR #111513)

[Owen Pan via cfe-commits]

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@@ -53,3 +53,13 @@ foreach (file IN LISTS files)
 endforeach ()
 
 add_custom_target(clang-format-check-format DEPENDS ${check_format_depends})
+
+set(style_options_depends ${CLANG_SOURCE_DIR}/docs/ClangFormatStyleOptions.rst)
+add_custom_command(OUTPUT ${style_options_depends}
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owenca wrote:

```suggestion
set(docs_tools_dir ${CLANG_SOURCE_DIR}/docs/tools)
add_custom_command(OUTPUT ${style_options_depends}
```

https://github.com/llvm/llvm-project/pull/111513