hg: jdk9/dev/jdk: 8073924: Update test/java/nio/charset/Charset/NIOCharsetAvailability.java to work with module system

[xueming.shen at oracle.com]

Changeset: 32af5df346f5
Author:    sherman
Date:      2015-02-26 14:40 -0800
URL:       http://hg.openjdk.java.net/jdk9/dev/jdk/rev/32af5df346f5

8073924: Update test/java/nio/charset/Charset/NIOCharsetAvailability.java to work with module system
Summary: to use module's runtime filesystem to iterate the class files
Reviewed-by: alanb

! test/java/nio/charset/Charset/NIOCharsetAvailabilityTest.java