[clang-tools-extra] [clang-doc] Add basic benchmarks for library functionality (PR #182620)

[Paul Kirth via cfe-commits]

================
@@ -0,0 +1,20 @@
+set(LLVM_LINK_COMPONENTS
+  Support
+  )
+
+get_filename_component(CLANG_DOC_SOURCE_DIR
+  ${CMAKE_CURRENT_SOURCE_DIR}/../../clang-doc REALPATH)
----------------
ilovepi wrote:

I should have just cribbed from the `clang-doc/tool` folder. It was all that was needed 🤦 . Thanks for setting me straight. 

https://github.com/llvm/llvm-project/pull/182620