forked from Mirrors/opensbi

After the changes introduced by the previous patches are applied, there is no need of the manual removal of the `build/` directory every time new test is added. Running `make clean` should be enough to regenerate the carray-related files. Update the documentation correspondingly. Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Reviewed-by: Anup Patel <anup@brainfault.org>