RFR: 8264610: Number.{byteValue, shortValue} spec should use @implSpec

[Brian Burkhalter]

On Thu, 1 Apr 2021 18:12:43 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Please review this small code change and its accompanying CSR:
> 
>  https://bugs.openjdk.java.net/browse/JDK-8264610

CSR also reviewed.

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Marked as reviewed by bpb (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/3314