Draft JLS spec for records

[Gavin Bierman]

Added. 

> On 26 Aug 2019, at 16:25, Brian Goetz <brian.goetz at oracle.com> wrote:
> 
>> The listing of serialPersistentFields seems fine too, again possible collision with the record component field.
>> 
>> serialVersionUID is static, so doesn't need to need to be listed. Ok.
> 
> You can’t have two fields with the same name, even if one is static and the other is not. So sVUID should stay on the list.
>