RFR: JDK-8219652: [aix] Tests failing with JNI attach problems. [v3]

[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)

Varada M has updated the pull request incrementally with one additional commit since the last revision:

  Added pthread attritubes to libterminatedThread.c

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15924/files
  - new: https://git.openjdk.org/jdk/pull/15924/files/210eadfb..51ffd3c2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15924&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15924&range=01-02

  Stats: 6 lines in 1 file changed: 5 ins; 0 del; 1 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