hg: jigsaw/jake/langtools: Reduce ModuleTarget to one target platform value

[alan.bateman at oracle.com]

Changeset: 4d2852920d34
Author:    alanb
Date:      2017-04-26 21:09 +0100
URL:       http://hg.openjdk.java.net/jigsaw/jake/langtools/rev/4d2852920d34

Reduce ModuleTarget to one target platform value

! src/jdk.jdeps/share/classes/com/sun/tools/classfile/ClassWriter.java
! src/jdk.jdeps/share/classes/com/sun/tools/classfile/ModuleTarget_attribute.java
! src/jdk.jdeps/share/classes/com/sun/tools/javap/AttributeWriter.java