simoop: shove sub-page writes under --unalignedwrites (-u)

simoop was originally looking for filesystem correctness bugs, so it
intentionally did subpage writes to find more problems.  Put this under
-u instead of making it the default

Signed-off-by: Chris Mason <clm@fb.com>
1 file changed
tree: 5d3219d3cc24b3831b3fb4f5654969f1aed7f3e5
  1. Makefile
  2. simoop.c
  3. xxhash.c
  4. xxhash.h