RFR: 8305174: disable dtrace for s390x builds

[Amit Kumar]

On Wed, 29 Mar 2023 13:04:39 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

> As stated in JBS-issue, `dtrace` functionality is not available on s390x. So disabling it explicitly in the build.

@MBaesken , @erikj79 , @RealLucy  Please review. 🙂

Probably I'm missing something, But I'm a bit confused that string `xs390x` is not recognised as a valid CPU here. 
Output for `xs390x`:

checking for dtrace tool and platform support... no
checking sys/sdt.h usability... no
checking sys/sdt.h presence... no
checking for sys/sdt.h... no
configure: Cannot enable dtrace with missing dependencies. See above.
checking if JVM feature 'dtrace' is available... no


output for `xs390`:

checking for dtrace tool and platform support... no, s390
checking sys/sdt.h usability... no
checking sys/sdt.h presence... no
checking for sys/sdt.h... no
configure: Cannot enable dtrace with missing dependencies. See above.
checking if JVM feature 'dtrace' is available... no

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PR Comment: https://git.openjdk.org/jdk/pull/13228#issuecomment-1488599607