[11]RFR: 8203030: Zero s390 31 bit size_t type conflicts in shared code

[Chris Phillips]

Hi,

Please review this set of changes to shared code
related to S390 (31bit) Zero self-build type mis-match failures.

Bug:    https://bugs.openjdk.java.net/browse/JDK-8203030
webrev: http://cr.openjdk.java.net/~chrisphi/JDK-8203030/webrev.0


Cheers!
Chris Phillips @ Red Hat in T.O.