hg: shenandoah/jdk8u/hotspot: ShenandoahSATBBufferSize cannot be size_t in 8u

[shade at redhat.com]

Changeset: dd55274df3b3
Author:    shade
Date:      2018-11-12 19:43 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/dd55274df3b3

ShenandoahSATBBufferSize cannot be size_t in 8u

! src/share/vm/gc_implementation/shenandoah/shenandoah_globals.hpp