hg: jigsaw/jake/jdk: Check for package names of "" to prevent anonymous class names that start with '/'.

[harold.seigel at oracle.com]

Changeset: d7102ae141b1
Author:    hseigel
Date:      2016-03-09 15:55 -0500
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/d7102ae141b1

Check for package names of "" to prevent anonymous class names that start with '/'.
Reviewed by: alanb, shade

! src/java.base/share/classes/java/lang/invoke/StringConcatFactory.java