[docs] Fix linking issues in LibASTMatchers tutorial

[jubnzv]

Summary

Update CMakeLists.txt in the tutorial to reflect the latest changes in LLVM.
The demo projects cannot be linked without added libraries.

[xgupta]

Thanks for the patch @jubnzv!
Except that one nit changes look good to me. Just a few months ago I also face a similar issue with RAVFrontendAction.rst during Shared build and commit a patch rG6ee1f64a2e828d27a6c20839232b3ac828367123.

clang/docs/LibASTMatchersTutorial.rst

111

You should list these or preferably all target_link_librarie in alphabetical order for example see: https://github.com/llvm/llvm-project/blob/main/clang/lib/Tooling/CMakeLists.txt#L125.

[jubnzv]

Thanks! I've sorted the libraries.

clang/docs/LibASTMatchersTutorial.rst

::
       add_clang_executable(loop-convert
         LoopConvert.cpp
         )
       target_link_libraries(loop-convert
         PRIVATE
         clangTooling
         clangBasic
         clangASTMatchers
+        clangAST
+        clangSerialization
+        clangFrontend
         )
 
 With that done, Ninja will be able to compile our tool. Let's give it
 something to compile! Put the following into
 ``clang-tools-extra/loop-convert/LoopConvert.cpp``. A detailed explanation of
 why the different parts are needed can be found in the `LibTooling
 documentation <LibTooling.html>`_.