RFR (S) [8u] backport 8141421: Various test fail with OOME on win x86

[David Buck]

Hi!

May I please get a review of this simple backport to 8u-dev? The only 
reason the JDK 9 fix does not apply as-is to JDK 8 is because of changes 
to assert in JDK 9 [0].

bug report:
https://bugs.openjdk.java.net/browse/JDK-8141421

JDK 9 review thread:
http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2016-January/016251.html

JDK 9 changeset:
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/2de6311c5afc

JDK 8 webrev (for review):
http://cr.openjdk.java.net/~dbuck/8141421_hotspot_jdk8_ver01/

Cheers,
-Buck

[0] https://bugs.openjdk.java.net/browse/JDK-8080775