Update C++ server with new core API

And reflects the C++ API in ServerBuilder.
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 64478b3..649cf9f 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -271,7 +271,7 @@
 if forever:
   success = True
   while True:
-    dw = watch_dirs.DirWatcher(['src', 'include', 'test'])
+    dw = watch_dirs.DirWatcher(['src', 'include', 'test', 'examples'])
     initial_time = dw.most_recent_change()
     have_files_changed = lambda: dw.most_recent_change() != initial_time
     previous_success = success