CLOSED TREE
Backed out changeset 12ce98475c6e (bug 1119980)
Backed out changeset bdb8d05f8870 (bug 1119980)
Backed out changeset a68a18840492 (bug 1119980)
It's unused (the sole caller is already commented out),
and uses deprecated ftime() & sys/timeb.h which are not
available on OpenBSD and Android NDK r10c.
Dont build openaes/rand.c, OAES_HAVE_ISAAC is not defined.
Remove now unused rand.c & rand.h.