hg: jdk/sandbox: 8252592: Non-PCH build is broken after JDK-8251560

[chris.hegarty at oracle.com]

Changeset: a7e6fbe45957
Author:    shade
Date:      2020-09-01 07:06 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/a7e6fbe45957

8252592: Non-PCH build is broken after JDK-8251560
Reviewed-by: zgu, iklam

! src/hotspot/share/gc/shenandoah/mode/shenandoahIUMode.cpp
! src/hotspot/share/gc/shenandoah/mode/shenandoahSATBMode.cpp
! src/hotspot/share/gc/shenandoah/shenandoahArguments.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp