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.

Makefile.in

@@ -67,6 +67,7 @@ clean-doc:
 
 install-bin: $(BINDIR)
 	@install -m 755 ct-ng $(BINDIR)/ct-ng
+	@ln -s $(LIBDIR)/tools/ct-ng.extract-config $(BINDIR)/ct-ng.extract-config
 
 install-lib: $(LIBDIR) install-lib-main install-lib-samples
 
@@ -74,6 +75,7 @@ install-lib-main: $(LIBDIR)
 	@for src_dir in config kconfig patches scripts tools; do            \
 	     tar cf - --exclude=.svn $${src_dir} |(cd $(LIBDIR); tar xf -); \
 	 done
+	@rm -f $(LIBDIR)/tools/addToolVersion.sh
 	@for src_file in Makefile.steps version; do                 \
 	     install -m 644 $${src_file} $(LIBDIR)/$${src_file};    \
 	 done