RFE: Add compressed oops to VM info string

[Florian Weimer]

* Coleen Phillimore:

> This
>> Java HotSpot(TM) Server VM (build 23.0-b03, mixed mode, tiered, serial gc, zerobased coops)
> "zerobased coops" looks awkward to me.   If the requirement is that
> you know whether compressed oops is on or off, simply printing
> "compressed oops" meets that.   If you want to know more about the
> compressed oops mode, you can use the option PrintCompressedOopsMode
> (not PrintFlagsFinal, which oddly doesn't mention compressed oops).

This option is guarded by -XX:+UnlockDiagnosticVMOptions (for my future
reference 8-).

-- 
Florian Weimer                <fweimer at bfk.de>
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