RFR - JDK-8215682 - Remove compiler support for Raw String Literals from JDK 12

[Alex Buckley]

I tightened up the text a bit, and added myself as a reviewer.

On 1/2/2019 10:02 AM, Jim Laskey wrote:
> Looking for reviewers to make sure this CSR passes muster.
>
> CSR: https://bugs.openjdk.java.net/browse/JDK-8215682
>
> Thank you.
>
> Cheers,
>
> — Jim