Array constructor/destructor update

[Jim Dehnert]

The layout document has been updated with today's decisions about
array constructors/destructors.

The cookie description is fixed at:

    http://reality.sgi.com/dehnert_engr/cxx/abi-layout.html#array-cookies

The APIs of the runtime support are described at:

    http://reality.sgi.com/dehnert_engr/cxx/abi-layout.html#array-runtime

Please read them and send any comments...  Mark has agreed to provide
reference code for the runtime routines.

Jim

-		Jim Dehnert  x3-4272