Add a program calculating some of the exact conditions where gf_gen_rs_matrix
works, add comments stating these bounds to gf_gen_rs_matrix, and fix erasure
code test that violates the bounds.
Change-Id: I1d0010b09fea97731bfd24f4f76e24609538b24f
Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>
