Ignore 2 pedantic clippy lints in new unwind safety test

    warning: adding items after statements is confusing, since items exist from the start of the scope
       --> tests/test.rs:391:5
        |
    391 |     fn require_unwind_safe<T: UnwindSafe>() {}
        |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#items_after_statements
        = note: `-W clippy::items-after-statements` implied by `-W clippy::pedantic`
        = help: to override `-W clippy::pedantic` add `#[allow(clippy::items_after_statements)]`

    warning: adding items after statements is confusing, since items exist from the start of the scope
       --> tests/test.rs:394:5
        |
    394 |     fn require_ref_unwind_safe<T: RefUnwindSafe>() {}
        |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#items_after_statements

    warning: binding to `_` prefixed variable with no side-effect
       --> tests/test.rs:388:9
        |
    388 |     let _unwind_safe = |c: UniquePtr<ffi::C>| panic::catch_unwind(|| drop(c));
        |         ^^^^^^^^^^^^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect_underscore_binding
        = note: `-W clippy::no-effect-underscore-binding` implied by `-W clippy::pedantic`
        = help: to override `-W clippy::pedantic` add `#[allow(clippy::no_effect_underscore_binding)]`

    warning: binding to `_` prefixed variable with no side-effect
       --> tests/test.rs:389:9
        |
    389 |     let _ref_unwind_safe = |c: &ffi::C| panic::catch_unwind(|| inspect(c));
        |         ^^^^^^^^^^^^^^^^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect_underscore_binding

tests/test.rs

@@ -383,6 +383,7 @@ fn test_raw_ptr() {
 }
 
 #[test]
+#[allow(clippy::items_after_statements, clippy::no_effect_underscore_binding)]
 fn test_unwind_safe() {
     fn inspect(_c: &ffi::C) {}
     let _unwind_safe = |c: UniquePtr<ffi::C>| panic::catch_unwind(|| drop(c));