Update libprotoc.cmake

cmake/libprotoc.cmake

diff --git a/cmake/libprotoc.cmake b/cmake/libprotoc.cmake
index b71f2f1..ecb5a85 100644
--- a/cmake/libprotoc.cmake
+++ b/cmake/libprotoc.cmake
@@ -93,6 +93,7 @@
   ${protobuf_source_dir}/src/google/protobuf/compiler/cpp/cpp_message.h
   ${protobuf_source_dir}/src/google/protobuf/compiler/cpp/cpp_message_field.h
   ${protobuf_source_dir}/src/google/protobuf/compiler/cpp/cpp_message_layout_helper.h
+  ${protobuf_source_dir}/src/google/protobuf/compiler/cpp/cpp_names.h
   ${protobuf_source_dir}/src/google/protobuf/compiler/cpp/cpp_options.h
   ${protobuf_source_dir}/src/google/protobuf/compiler/cpp/cpp_padding_optimizer.h
   ${protobuf_source_dir}/src/google/protobuf/compiler/cpp/cpp_primitive_field.h