RFR(S) [8u] 8189170: Add option to disable stack overflow checking in primordial thread for use with JNI_CreateJavaJVM

[David Buck]

Hi!

Please review my backport of this small change to JDK 8.

bug report:
https://bugs.openjdk.java.net/browse/JDK-8189170

original JDK changeset:
http://hg.openjdk.java.net/jdk/jdk/rev/9fd89aabb6cd

code review of original change:
http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2017-November/025207.html

JDK 8 webrev for review:
http://cr.openjdk.java.net/~dbuck/8189170_jdk8_ver00/

All standard JPRT tests run and passed (hotspot testset). Effectiveness 
of change manually confirmed with dummy JNI invocation test case.

Cheers,
-Buck