File access calls in libCLight have been stubbed out till a filesystem
is implemented.
The rand() call will always return "23".
Maximum usable amount of memory is determined at compile time, must
be a power of 2 due to quirks with the Sigma0 interface.
Assumption is made that sizeof(unsigned long) is equal to sizeof(void *).
This is true on most systems. (As a side note, Linux current makes the
same assumption).
