[docs] Fix linking issues in LibASTMatchers tutorial

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

Reviewed By: xgupta

Differential Revision: https://reviews.llvm.org/D105409

clang/docs/LibASTMatchersTutorial.rst

@@ -105,9 +105,12 @@ CMakeLists.txt should have the following contents:
         )
       target_link_libraries(loop-convert
         PRIVATE
-        clangTooling
-        clangBasic
+        clangAST
         clangASTMatchers
+        clangBasic
+        clangFrontend
+        clangSerialization
+        clangTooling
         )
 
 With that done, Ninja will be able to compile our tool. Let's give it