hg: jdk/submit: 8243486: ZGC: Adjust "Allocated" statistics to take undone page allocations into account

[per.liden at oracle.com]

Changeset: 5736a55d1389
Author:    pliden
Date:      2020-04-23 19:23 +0200
URL:       https://hg.openjdk.java.net/jdk/submit/rev/5736a55d1389

8243486: ZGC: Adjust "Allocated" statistics to take undone page allocations into account
Reviewed-by: eosterlund, stefank

! src/hotspot/share/gc/z/zPageAllocator.cpp