message: Set code completion thread name
diff: #include "code_completion.h"
  #include "libclangmm/Utility.h"
  +#include "platform.h"
  #include "timer.h"
  #include <algorithm>
  @@ -369,6 +370,7 @@ void CompletionSession::Refresh(std::vector<CXUnsavedFile>& unsaved) {
  CompletionManager::CompletionManager(IndexerConfig* config, Project* project, WorkingFiles* working_files)
  : config(config), project(project), working_files(working_files) {
  new std::thread([&]() {
  + SetCurrentThreadName("completion");
  CompletionMain(this);
  });
  }
  