1.0.4.1: fix sb-posix atime/mtime/ctime

1.0.4.1: fix sb-posix atime/mtime/ctime
 * st_atime, st_mtime and st_ctime were broken in a perhaps misguided
   attempt to fix these for x86-64 by exposing the timespec struct
   instead of just passing the first time_t (which is really the
   tv_sec field of the struct) as the return value. This patch
   restores the previous behavior. This may cause a regression for
   x86_64/darwin, but we should find a better fix. We should also
   consider removing the wrapped_stat bit and the corresponding C code
   wrapper.