Add $deserializeLambda$ to a set of known serialization-related methods

[jerrinot]

Fixes #31

I'm not sure how to add a test. I tried to add

    @AssertNoWarning("UncalledPrivateMethod")
    private static class SerializedClass implements Serializable {
        private int foo;

        private Runnable foo() {
            return () -> {
                System.out.println(foo);
            };
        }
    }

but that's passing even without the patch. I guess I'd need to annotate the $deserializeLambda$ method, but the method is generated by Java compiler.

[coveralls]

Coverage remained the same at 86.21% when pulling bb28c60 on jerrinot:fixes/lambda-deserialization-method/master into 3fff9d6 on amaembo:master.

[amaembo]

What about return (Runnable & Serializable) () -> ...? Will it still pass without patch?