message: Use c++14 by default if no language is specified.
diff: @@ -153,7 +153,7 @@ Project::Entry GetCompilationEntryFromCompileCommandEntry(
  if (*source_file_type == "c")
  result.args.push_back("-std=gnu11");
  else if (*source_file_type == "c++")
  - result.args.push_back("-std=c++11");
  + result.args.push_back("-std=c++14");
  }
  }
  