Add a new scalar base point multiplication test case generator that
where the points are *not* Montgomery-encoded. This way we don't need
to generate different test data files when the Montgomery encoding
for a curve isn't the same for 32-bit and 64-bit targets (P-521).
This version of the generator produces the test cases for all the
scalars that the current P-256 and P-384 tests generate, in the same
format; the only exception is that the point is not
Montgomery-encoded.