RFR: 8081833: Clean up JVMFlag getter/setter code

[Kim Barrett]

> On Sep 15, 2020, at 1:18 AM, Ioi Lam <iklam at openjdk.java.net> wrote:
> 
> This is a follow to [JDK-8243208 Clean up JVMFlag implementation](https://bugs.openjdk.java.net/browse/JDK-8243208).
> 
> […]
> Commit messages:
> - 8081833: Clean up JVMFlag getter/setter code
> 
> Changes: https://git.openjdk.java.net/jdk/pull/163/files
> Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=163&range=00
>  Issue: https://bugs.openjdk.java.net/browse/JDK-8081833
>  Stats: 2260 lines in 26 files changed: 668 ins; 1397 del; 195 mod
>  Patch: https://git.openjdk.java.net/jdk/pull/163.diff
>  Fetch: git fetch https://git.openjdk.java.net/jdk pull/163/head:pull/163
> 
> PR: https://git.openjdk.java.net/jdk/pull/163

The webrev for this is broken by https://bugs.openjdk.java.net/browse/SKARA-619

See, for example, jvmFlagAccess.hpp lines 88, 98, and lines 103-110.