Using type_memsize_and_alignment() directly instead of reimplementing it.

Also fix the generated tests in oleaut32 to reflect correct sizes for 64-bit
typelibs.
Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>