[lldb] Add llvm-pdbutil to lldb test dependencies

Since D89812 we use llvm-pdbutil in the LLDB tests but we didn't add it to
the test dependencies.

lldb/test/CMakeLists.txt

@@ -141,6 +141,7 @@ add_lldb_test_dependency(
   llvm-nm
   llvm-mc
   llvm-objcopy
+  llvm-pdbutil
   llvm-readobj
   )