[nagiosplug] Update bundled libtool files

[Nagios Plugin Development]

 Module: nagiosplug
 Branch: master
 Commit: 8230bbd4a4a4b33c727ab187eb064373fc3b816e
 Author: Holger Weiss <holger at zedat.fu-berlin.de>
   Date: Thu Sep  5 00:03:00 2013 +0200
    URL: http://nagiosplug.git.sf.net/git/gitweb.cgi?p=nagiosplug/nagiosplug;a=commit;h=8230bbd

Update bundled libtool files

Import the current libtool version 2.4.2.

---

 build-aux/ltmain.sh  | 4016 +++++++++++++++++++++++++++++++++-----------------
 gl/m4/libtool.m4     | 2238 ++++++++++++++++++----------
 gl/m4/ltoptions.m4   |   32 +-
 gl/m4/ltversion.m4   |   12 +-
 gl/m4/lt~obsolete.m4 |   12 +-
 5 files changed, 4093 insertions(+), 2217 deletions(-)

Diff: http://nagiosplug.git.sf.net/git/gitweb.cgi?p=nagiosplug/nagiosplug;a=commitdiff;h=8230bbd