review request (L): 7013417: JSR 292 needs to support variadic method handle calls

[John Rose]

This is a chunk of EG cleanup work, consisting of JDK code changes only.

  http://cr.openjdk.java.net/~jrose/7013417/webrev.00/

We will want to put in a fast-path for this in the JVM, later.

More changes in the pipeline:

 - JDK only: 7012650 implement JSR 292 EG adjustments through January 2010

 - JVM & JDK: 7012648 move JSR 292 to package java.lang.invoke and adjust names

The rename change will require a phased introduction of JVM changes (to adjust hard-coded dependencies), followed by JDK changes.

-- John