RFR: 8273487: Zero: Handle "zero" variant in runtime tests [v2]

[David Holmes]

On Wed, 8 Sep 2021 13:25:27 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> JDK-8179317 rewritten runtime shell tests to Java. There is a little omission in VM variant selection, which makes Zero fail some of the tier1 tests, like:
>> 
>> 
>> $ CONF=linux-x86_64-zero-fastdebug make exploded-test TEST=runtime/StackGap/TestStackGap.java
>> 
>> STDERR:
>> java.lang.Error: TESTBUG: unsupported vm variant
>> at jdk.test.lib.Platform.variant(Platform.java:368)
>> at jdk.test.lib.Platform.jvmLibDir(Platform.java:357)
>> at jdk.test.lib.process.ProcessTools.addJvmLib(ProcessTools.java:585)
>> at jdk.test.lib.process.ProcessTools.createNativeTestProcessBuilder(ProcessTools.java:575) 
>> 
>> 
>> Additional testing:
>>  - [x] Linux x86_64 Zero affected tests (StackGap, StackGuardPages, TestTLS) now run
>
> Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Build system awkwardness ensues

Marked as reviewed by dholmes (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/5413