hg: jdk/sandbox: Make sure Epsilon is able to use the last bit of expanded heap

[ashipile at redhat.com]

Changeset: 67d289ae67f5
Author:    shade
Date:      2017-12-08 15:44 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/67d289ae67f5

Make sure Epsilon is able to use the last bit of expanded heap

! src/hotspot/share/gc/epsilon/epsilonHeap.cpp