other rec_ functions based on OProfile measurements on GNU/Linux x86.


innobase/include/rem0rec.h:
  Replace FALSE/TRUE ibool comp with zero/nonzero ulint comp.
  Remove rec_set_node_ptr_flag().
innobase/include/rem0rec.ic:
  Replace FALSE/TRUE ibool comp with zero/nonzero ulint comp.
  Remove rec_set_node_ptr_flag().
  Add UNIV_LIKELY and UNIV_UNLIKELY hints.
  Correct a spelling error in comment.
  Simplify rec_get_deleted_flag().
innobase/rem/rem0rec.c:
  Add UNIV_LIKELY and UNIV_UNLIKELY hints.
  rec_init_offsets(), rec_get_offsets_func(): Optimize for x86.
  rec_set_field_extern_bits(): Move "comp" flag outside the loop.
  rec_copy_prefix_to_buf(): Add UNIV_PREFETCH hints.