hg: zgc/zgc: 2 new changesets

[stefan.karlsson at oracle.com]

Changeset: 6980911cf647
Author:    stefank
Date:      2018-05-24 08:45 +0200
URL:       http://hg.openjdk.java.net/zgc/zgc/rev/6980911cf647

ZGC: Add error handling for -XX:ParallelGCThreads=0 and -XX:ConcGCThreads=0

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

Changeset: 6da56c3d901a
Author:    stefank
Date:      2018-05-24 08:45 +0200
URL:       http://hg.openjdk.java.net/zgc/zgc/rev/6da56c3d901a

ZGC: Set ClassUnloading to false

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