hg: jdk-updates/jdk11u: 8212100: AppCDS crashes for some uses with JRuby

[jiangli.zhou at oracle.com]

Changeset: 4dab5207e921
Author:    jiangli
Date:      2018-10-16 15:09 -0400
URL:       http://hg.openjdk.java.net/jdk-updates/jdk11u/rev/4dab5207e921

8212100: AppCDS crashes for some uses with JRuby
Summary: Make sure FileMapInfo::verify_mapped_heap_regions only verifies 'num' of spaces.
Reviewed-by: iklam

! src/hotspot/share/memory/filemap.cpp