Fix the install procedure:
- remove useless script tools/addToolVersion.sh: it is not needed when running crosstool-NG, only for developpers,
- create a symlink to the configuration extract script, so that it is in the PATH if ct-ng is.

 This is NOT the official version of dialog.  This version has been

 significantly modified from the original.  It is for use by the Linux

 kernel configuration script.  Please do not bother Savio Lam with 

 questions about this program.