[llvm] [CI][libclang] Add PR autolabeling for libclang (PR #102809)

[Vlad Serebrennikov via llvm-commits]

================
@@ -990,6 +990,11 @@ clang:openmp:
   - llvm/unittests/Frontend/OpenMP*
   - llvm/test/Transforms/OpenMP/**
 
+clang:as-a-library:
+  - clang/tools/libclang/**
+  - clang/bindings/**
+  - clang/include/clang-c/**
----------------
Endilll wrote:

```suggestion
  - clang/include/clang-c/**
  - clang/test/LibClang/**
  - clang/unittest/libclang/**
```

https://github.com/llvm/llvm-project/pull/102809