RFR: 8270517: Add Zero support for LoongArch [v2]

[Ao Qi]

On Thu, 15 Jul 2021 07:54:41 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Ao Qi has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   removed redundant whitespaces
>
> Marked as reviewed by dholmes (Reviewer).

@dholmes-ora @erikj79 and @shipilev , thanks for the fast review! I also did a release bootcycle-images test and a jcstress test. They are passed. Could you help to sponsor it?

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PR: https://git.openjdk.java.net/jdk/pull/4787