hg: jdk/sandbox: 8204563: UseAppCDS obsolete message confusing

[chris.hegarty at oracle.com]

Changeset: 50469fb301c4
Author:    ccheung
Date:      2018-06-11 09:40 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/50469fb301c4

8204563: UseAppCDS obsolete message confusing
Reviewed-by: jiangli, mseledtsov, dholmes

! src/hotspot/share/runtime/arguments.cpp
! test/hotspot/jtreg/runtime/appcds/CommandLineFlagComboNegative.java