hg: jdk10/hs/hotspot: 8178604: JVM does not allow defining boot loader modules in exploded build after module system initialization

[harold.seigel at oracle.com]

Changeset: d8e357af49fa
Author:    hseigel
Date:      2017-05-16 09:33 -0400
URL:       http://hg.openjdk.java.net/jdk10/hs/hotspot/rev/d8e357af49fa

8178604: JVM does not allow defining boot loader modules in exploded build after module system initialization
Summary: Allow defining of boot loader modules after initialization but add locks to synchronize access to exploded build list
Reviewed-by: dholmes, lfoltan

! src/share/vm/classfile/classLoader.cpp
! src/share/vm/classfile/modules.cpp