sync further changes from uts/aslr

*** 53,62 ****
--- 53,63 ----
      exit 1;
  fi
  
  ## kernel-produced core
  kill -SEGV $pid
+ wait $pid >/dev/null 2>&1
  
  cat > core-expected.$$ <<EOF
      namesz: 0x5
      descsz: 0x28
      type:   [ NT_SECFLAGS ]