PDK example personality:  Vector Add (cae_vadd64)

This personality implements a vector addition and sum reduction using 
PDK 2.0.  It uses 64-byte read and write operations available
in Wolverine platforms.

- To set up the environment:

    source /opt/convey/pdk2/<rev>/settings.(c)sh

- To compile the application:

    cd cae_vadd/app
    make

- To run the simulation:

    cd cae_vadd/sim
    ./runsim

- To build the personality:

    cd cae_vadd/phys
    make