on mispredicted branches: opcontrol --event=BR_CND_MISSP_EXEC:45000

UT_SORT_FUNCTION_BODY(): Copy the array with memcpy(3).

cmp_dtuple_rec_with_match(), cmp_rec_rec_with_match(),
cmp_debug_dtuple_rec_with_match(): Add UNIV_UNLIKELY hints around
tests for REC_INFO_MIN_REC_FLAG.