hg: jdk10/hs: 8187028: [aix] Real thread stack size may be up to 64K smaller than requested one

[goetz.lindenmaier at sap.com]

Changeset: 3d7757370ef3
Author:    stuefe
Date:      2017-09-26 11:25 +0200
URL:       http://hg.openjdk.java.net/jdk10/hs/rev/3d7757370ef3

8187028: [aix] Real thread stack size may be up to 64K smaller than requested one
Reviewed-by: goetz

! src/hotspot/os/aix/os_aix.cpp