ModuleInfoExtender should be ASM6 aware

The ModuleInfoExtender was a facility to add ModuleAttributes using ASM5.
ASM5 is pre-modules based implementation. However, ASM6 now supports
specified module attributes inherently, and the ModuleInfoExtender must be
adapted to use ASM6.

http://hg.openjdk.java.net/jdk10/jdk10/jdk/file/74776ebdab24/src/java.base/share/classes/jdk/internal/module/ModuleInfoExtender.java

The Attributest are being defined here:
http://hg.openjdk.java.net/jdk10/jdk10/jdk/file/74776ebdab24/src/java.base/share/classes/jdk/internal/module/ClassFileAttributes.java

The latest ASM6 patch adapted to the JDK is attached.

It is likely jlink will also need some re-factoring and adjustments.

Not doing so will not allow JDK's internal version of ASM, to be updated.