hg: jdk/sandbox: Fix nopch build errors

[thomas.stuefe at gmail.com]

Changeset: c9407bd0a516
Author:    stuefe
Date:      2020-08-30 10:14 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/c9407bd0a516

Fix nopch build errors

! src/hotspot/share/memory/metaspace/msSettings.cpp
! test/hotspot/gtest/metaspace/test_metaspacearena.cpp
! test/hotspot/gtest/metaspace/test_metaspacearena_stress.cpp