message: Use all the clang_arg variants
diff: @@ -218,15 +218,12 @@ fn build_bindings(base: &str, bindings: &Bindings, includes: &[PathBuf]) {
  let mut builder = Builder::default().header(header).generate_comments(false);
  - builder = builder.clang_arg(String::from("-v"));
  + builder = builder.clang_arg("-v");
  for i in includes {
  builder = builder.clang_arg(String::from("-I") + i.to_str().unwrap());
  }
  if bindings.cplusplus {
  - builder = builder
  - .clang_arg(String::from("-x"))
  - .clang_arg(String::from("c++"));
  - builder = builder.clang_arg(String::from("-std=c++11"));
  + builder = builder.clang_args(&["-x", "c++", "-std=c++11"]);
  }
  // Apply the configuration.
  