hg: jdk/sandbox: 8218755: Refix Symbol leak in prepend_host_package_name

[chris.hegarty at oracle.com]

Changeset: 4dab92cc7aed
Author:    coleenp
Date:      2019-02-13 07:22 -0500
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/4dab92cc7aed

8218755: Refix Symbol leak in prepend_host_package_name
Summary: fix Symbol refcounting again, add comment and a test.
Reviewed-by: kbarrett, dholmes

! src/hotspot/share/classfile/classFileParser.cpp
+ test/hotspot/jtreg/runtime/defineAnonClass/AnonSymbolLeak.java
! test/hotspot/jtreg/runtime/defineAnonClass/DefineAnon.java
+ test/hotspot/jtreg/runtime/defineAnonClass/TestAnonSymbolLeak.java
! test/hotspot/jtreg/runtime/defineAnonClass/UnsafeDefMeths.java