Update ntpdate to fix vulnerabilities.

[Nicola Ferralis]

ntpdate in hardy for dell mini (1:4.2.4p4+dfsg-3ubuntu2.1) is affected by 2 vulnerabilities, fixed in generic hardy (1:4.2.4p4+dfsg-3ubuntu2.2)

Changelog 1:4.2.4p4+dfsg-3ubuntu2.2
  * SECURITY UPDATE: stack overflow in ntpd when autokey is enabled
    - debian/patches/CVE-2009-1252.patch: update ntpd/ntp_crypto.c to use
      snprintf() with NTP_MAXSTRLEN when writing to statstr. Also defensively
      adjust ntp_peer.c and ntp_timer.c to do the same.
    - CVE-2009-1252
  * SECURITY UPDATE: stack overflow in ntpq when contacting malicious ntp
    server
    - debian/patches/CVE-2009-0159.patch: increase size of buffer in
      cookedprint() in ntpq/ntpq.c and adjust to use snprintf()
    - CVE-2009-0159