RFR: JDK-8219652: [aix] Tests failing with JNI attach problems.

[Varada M]

Similar issue [JDK-8303549](https://bugs.openjdk.org/browse/JDK-8303549) where AttachCurrentThread is failing  on AIX due t stack size issue.
Test cases:
runtime/jni/terminatedThread/TestTerminatedThread.java 
vmTestbase/nsk/jvmti/scenarios/jni_interception/JI05/ji05t001/TestDescription.java 
vmTestbase/nsk/jvmti/scenarios/jni_interception/JI06/ji06t001/TestDescription.java 
vmTestbase/nsk/jvmti/SetJNIFunctionTable/setjniftab001/TestDescription.java

Reported Issue : [JDK-8219652](https://bugs.openjdk.org/browse/JDK-8219652)

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Commit messages:
 - AttachCurrentThread() failure solution

Changes: https://git.openjdk.org/jdk/pull/15924/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15924&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8219652
  Stats: 181 lines in 5 files changed: 148 ins; 10 del; 23 mod
  Patch: https://git.openjdk.org/jdk/pull/15924.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15924/head:pull/15924

PR: https://git.openjdk.org/jdk/pull/15924