message: Rename tests for `-Zextra-link-arg`.
diff: use cargo_test_support::{basic_bin_manifest, project};
  #[cargo_test]
  -fn build_script_extra_bin_link_args() {
  +fn build_script_extra_link_arg_bin() {
  let p = project()
  .file("Cargo.toml", &basic_bin_manifest("foo"))
  .file("src/main.rs", "fn main() {}")
  @@ -27,7 +27,7 @@ fn build_script_extra_bin_link_args() {
  }
  #[cargo_test]
  -fn build_script_extra_link_args() {
  +fn build_script_extra_link_arg() {
  let p = project()
  .file("Cargo.toml", &basic_bin_manifest("foo"))
  .file("src/main.rs", "fn main() {}")
  @@ -51,7 +51,7 @@ fn build_script_extra_link_args() {
  }
  #[cargo_test]
  -fn build_script_extra_link_args_warn_on_stable() {
  +fn build_script_extra_link_arg_warn_without_flag() {
  let p = project()
  .file("Cargo.toml", &basic_bin_manifest("foo"))
  .file("src/main.rs", "fn main() {}")
  