RFR: 8273487: Zero: Handle "zero" variant in runtime tests

[Alan Bateman]

On Wed, 8 Sep 2021 10:57:33 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:
>  - [ ] Linux x86_64 Zero affected tests (StackGap, StackGuardPages, TestTLS) now run

Marked as reviewed by alanb (Reviewer).

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