hg: jdk/sandbox: Fix non-PCH build

[ashipile at redhat.com]

Changeset: d661341c153a
Author:    shade
Date:      2018-04-19 15:37 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/d661341c153a

Fix non-PCH build

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