RFR 8211268: Disable unsupported GCs for Zero

[Aleksey Shipilev]

On 09/28/2018 05:57 PM, Severin Gehwolf wrote:
> On Fri, 2018-09-28 at 08:48 -0700, Erik Joelsson wrote:
>> But then quietly disables it anyway. Not a big issue and probably not 
>> worth fixing given that zero on that platform is a rather rare 
>> configuration (unless for testing purposes).
> 
> Hmm, wouldn't this only show up on a configure like this?
> 
> $ configure --with-jvm-features=zgc --with-jvm-variants=zero [...]
> 
> If so, who would really do this? So IMO, not worth fixing.

Yeah, I think it is a minor nuisance. Pushed as is.

-Aleksey