hg: jdk/sandbox: 8214230: Classes generated by SystemModulesPlugin.java are not reproducable

[chris.hegarty at oracle.com]

Changeset: abccada595dd
Author:    ehelin
Date:      2018-12-04 09:30 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/abccada595dd

8214230: Classes generated by SystemModulesPlugin.java are not reproducable
Reviewed-by: alanb, redestad, mchung

! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/SystemModulesPlugin.java
+ test/jdk/tools/jlink/JLinkReproducibleTest.java