Add single-opcode test to basic_cfu.
Add single-opcode test to basic_cfu.

Signed-off-by: Tim Callahan <ea16a3c075a6a229c9a452aa4faba7441b41c040@google.com>

google/CFU-Playground,google/CFU-Playground,google/CFU-Playground,google/CFU-Playground