util-linux: security bump to version 2.29.2

From https://www.kernel.org/pub/linux/utils/util-linux/v2.29/v2.29.2-ReleaseNotes



This release fixes su(1) security issue CVE-2017-2616:

  It is possible for any local user to send SIGKILL to other processes with root
  privileges.  To exploit this, the user must be able to perform su with a
  successful login.  SIGKILL can only be sent to processes which were executed
  after the su process.  It is not possible to send SIGKILL to processes which
  were already running.

Drop upstream patches and autoreconf since it's no longer required.

[Peter: extend commit message with CVE info / description]
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>