Bug#58691: Upgrading libc6 fails with tetex-bin installed

[Torsten Landschoff <torsten@pclab.ifg.uni-kiel.de>]

Package: libc6
Severity: critical
Version: 2.1.3-4

Hi Joel, 

Sorry, but I have to tell you that the libc6 in frozen just broke during 
an upgrade. The problem lies in the new preinst that checks for /etc/localtime
being a link and uses readlink to follow that link.

Now we have 2 readlink binaries in Debian - debianutils has /bin/readlink
and tetex-bin /usr/bin/readlink. In my case the /usr/bin readlink was
invoked resulting in an error (that readlink takes exactly one argument).

Thanks

	Torsten