incompatibilities between dejagnu, tcllib sha1 module and tcl trf makes dejagnu unusable

[David Bariod]

When using the tcllib sha1 module with the tcl-trf package installed
it seems the tccllib load the libTrf2.1.4.so library.
When loaded this library seems to delete the global ::transform
procedure name from the loading tcl interpreter.
This name is also use within the dejagnu expect script to find binaries.
Therefore if any test suite loads the sha1 module while tcl-trf is installed,
it will break the dejagnu expect script.

This has been detected in ubuntu 13.10.
tcllib 1.15-dfsg-2
dejagnu 1.5-3
tcl-trf 2.1.4-dfsg1-1

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: tcl-trf (not installed)
ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
Uname: Linux 3.11.0-18-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Thu Mar 13 14:58:51 2014
InstallationDate: Installed on 2013-06-24 (262 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
SourcePackage: tcltrf
UpgradeStatus: Upgraded to saucy on 2013-12-03 (99 days ago)