Bad code generated for argument copies in local stubs

mic now generates the JavaToIDL 2.4 RTF form of local stubs,
which requires copying most non-primitive types. The copying
code has two serious errors:

1) If an argument list has only one copied argument, and it is
   not the first, incorrect code is generated that does not
   compile.

2) If an argument list has more than one copied argument, and the
   copied arguments do not occur contiguously in the argument
   list, incorrect code is generated that will cause runtime
   array indexing errors.

Both bugs are in writeCopyArguments in
sun.rmi.rmic.iiop.StubGenerator.