bench-slope: add unaligned buffer mode
* tests/bench-slope.c (unaligned_mode): New. (do_slope_benchmark): Unalign buffer if in unaligned mode enabled. (print_help, main): Add '--unaligned' parameter.
Patch adds --unaligned parameter to allow measurement of unaligned
buffer overhead.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>