RFR: 8306282: Build failure linux-arm32-open-cmp-baseline after JDK-8257967

[Markus Grönlund]

Greetings,

With [JDK-8257967](https://bugs.openjdk.org/browse/JDK-8257967), much refactoring was done to the JVMTI code concerning agents. However, some platforms do not have JVMTI support, and tier5 of testing builds an embedded build,  linux-arm32-open-cmp-baseline, which failed because the refactoring did not properly handle conditional compilations for JVMTI.

JDK-8257967 did run tier5, but it used an existing build, so it did not cause recompilations of the embedded target :-(

This changeset adds the conditional constructs to let linux-arm32-open-cmp-baseline build successfully.

It does not look good, but there you go...

Testing:

Building: linux-arm32-open-cmp-baseline
Building: regular platforms

Thanks
Markus

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Commit messages:
 - conditional constructs for embedded

Changes: https://git.openjdk.org/jdk/pull/13512/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13512&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306282
  Stats: 29 lines in 3 files changed: 2 ins; 7 del; 20 mod
  Patch: https://git.openjdk.org/jdk/pull/13512.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13512/head:pull/13512

PR: https://git.openjdk.org/jdk/pull/13512