build.sh print_examples called even when example given (#60)
build.sh print_examples called even when example given (#60)

./build.sh run <test-name> is supposed to build and run a single
test.  Instead it outputs the list of available tests.

The arguments have already been shifted so the check should be
<= 0
NetSys/NetBricks,NetSys/NetBricks,NetSys/e2d2,NetSys/NetBricks,NetSys/e2d2,NetSys/NetBricks,NetSys/e2d2,NetSys/e2d2,NetSys/e2d2,NetSys/e2d2,NetSys/e2d2,NetSys/NetBricks